ERROR 2025-06-05 18:37:22,191 17092547ms Service                MoveNext           - SearchFlightException:638847454405193562 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:48:28,472 17758829ms Service                MoveNext           - SearchFlightException:638847461078947537 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:54:39,808 18130165ms Service                MoveNext           - SearchFlightException:638847464786524723 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:54:41,090 18131446ms Service                MoveNext           - SearchFlightException:638847464805742910 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:55:38,423 18188779ms Service                MoveNext           - SearchFlightException:638847465379072588 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:56:12,535 18222892ms Service                MoveNext           - SearchFlightException:638847465723946768 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:56:28,896 18239252ms Service                MoveNext           - SearchFlightException:638847465883962164 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 18:57:11,643 18281999ms Service                MoveNext           - SearchFlightException:638847466310807225 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 19:14:23,822 19314179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 19:14:57,371 19347727ms Service                MoveNext           - SearchFlightException:638847476968091464 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 19:15:07,524 19357881ms Service                MoveNext           - SearchFlightException:638847477069469039 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 19:15:13,273 19363630ms Service                MoveNext           - SearchFlightException:638847477127738545 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 19:15:24,032 19374389ms Service                MoveNext           - SearchFlightException:638847477239077556 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:00:47,060 22097417ms Service                MoveNext           - SearchFlightException:638847504464981177 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:07:09,912 22480268ms Service                MoveNext           - SearchFlightException:638847508080390687 Running time: 21-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:07:54,791 22525147ms Service                MoveNext           - SearchFlightException:638847508297714636 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:09:03,875 22594232ms Service                MoveNext           - SearchFlightException:638847509433604536 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:11:16,412 22726768ms Service                MoveNext           - SearchFlightException:638847510313926731 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:13:38,585 22868942ms Service                MoveNext           - SearchFlightException:638847511735616984 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:17:34,243 23104599ms Service                MoveNext           - SearchFlightException:638847514529934578 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:18:38,264 23168621ms Service                MoveNext           - SearchFlightException:638847515162333533 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:20:08,132 23258489ms Service                MoveNext           - SearchFlightException:638847516066639083 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:22:22,613 23392970ms Service                MoveNext           - SearchFlightException:638847517410196225 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:22:37,817 23408174ms Service                MoveNext           - SearchFlightException:638847517127992608 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:22:51,803 23422160ms Service                MoveNext           - SearchFlightException:638847517702718652 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:23:40,760 23471117ms Service                MoveNext           - SearchFlightException:638847518192445637 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:24:02,230 23492586ms Service                MoveNext           - SearchFlightException:638847517972121810 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:24:30,078 23520434ms Service                MoveNext           - SearchFlightException:638847518250577321 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:24:39,783 23530139ms Service                MoveNext           - SearchFlightException:638847518347769375 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:25:10,567 23560923ms Service                MoveNext           - SearchFlightException:638847518655620313 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:25:20,784 23571141ms Service                MoveNext           - SearchFlightException:638847519192855310 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:25:51,461 23601817ms Service                MoveNext           - SearchFlightException:638847519064420491 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:26:23,619 23633976ms Service                MoveNext           - SearchFlightException:638847519821661923 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:26:41,289 23651646ms Service                MoveNext           - SearchFlightException:638847519562732852 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:27:11,745 23682102ms Service                MoveNext           - SearchFlightException:638847520271358149 Running time: 4-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:27:40,029 23710385ms Service                MoveNext           - SearchFlightException:638847520593564486 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:27:58,360 23728717ms Service                MoveNext           - SearchFlightException:638847520768288296 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:28:24,612 23754969ms Service                MoveNext           - SearchFlightException:638847521039253292 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:28:53,473 23783829ms Service                MoveNext           - SearchFlightException:638847521330048572 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:30:07,834 23858191ms Service                MoveNext           - SearchFlightException:638847522066771809 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:38:08,236 24338593ms Service                MoveNext           - SearchFlightException:638847526432313612 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:40:16,701 24467057ms Service                MoveNext           - SearchFlightException:638847527716958399 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:40:35,443 24485799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-05 20:40:40,147 24490503ms Service                MoveNext           - SearchFlightException:638847527951368813 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:41:13,915 24524272ms Service                MoveNext           - SearchFlightException:638847528289113865 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:47:45,517 24915873ms Service                MoveNext           - SearchFlightException:638847532204946872 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:50:29,287 25079644ms Service                MoveNext           - SearchFlightException:638847534282878915 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:51:43,668 25154024ms Service                MoveNext           - SearchFlightException:638847534586485626 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:52:08,685 25179042ms Service                MoveNext           - SearchFlightException:638847534836665279 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:54:00,961 25291317ms Service                MoveNext           - SearchFlightException:638847535959421243 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:54:10,118 25300474ms Service                MoveNext           - SearchFlightException:638847536050987764 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:54:40,545 25330901ms Service                MoveNext           - SearchFlightException:638847536355230262 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:56:18,491 25428847ms Service                MoveNext           - SearchFlightException:638847537334844111 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:56:35,914 25446271ms Service                MoveNext           - SearchFlightException:638847537509081821 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 20:59:37,247 25627604ms Service                MoveNext           - SearchFlightException:638847539322387675 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:01:32,811 25743167ms Service                MoveNext           - SearchFlightException:638847540661463415 Running time: 26-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:02:24,345 25794702ms Service                MoveNext           - SearchFlightException:638847540993272224 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:03:11,553 25841909ms Service                MoveNext           - SearchFlightException:638847541465332821 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:05:27,096 25977452ms Service                MoveNext           - SearchFlightException:638847542820767869 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:06:27,945 26038301ms Service                MoveNext           - SearchFlightException:638847543429089555 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:06:29,664 26040020ms Service                MoveNext           - SearchFlightException:638847543446591372 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:08:33,612 26163969ms Service                MoveNext           - SearchFlightException:638847544685772602 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:10:12,623 26262980ms Service                MoveNext           - SearchFlightException:638847545676133442 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:12:20,464 26390821ms Service                MoveNext           - SearchFlightException:638847546954310008 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:12:43,888 26414245ms Service                MoveNext           - SearchFlightException:638847547188699551 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:13:17,783 26448140ms Service                MoveNext           - SearchFlightException:638847547527782607 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:13:24,425 26454781ms Service                MoveNext           - SearchFlightException:638847547594195225 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:16:05,590 26615947ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:16:19,513 26629870ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:16:30,889 26641246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:16:35,750 26646106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:16:40,751 26651107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:16:41,360 26651717ms Service                MoveNext           - SearchFlightException:638847549563554257 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:19:22,440 26812796ms Service                MoveNext           - SearchFlightException:638847551174362608 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:19:44,723 26835080ms Service                MoveNext           - SearchFlightException:638847551396894687 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:25:20,798 27171155ms Service                MoveNext           - SearchFlightException:638847555203138300 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:26:34,741 27245097ms Service                MoveNext           - SearchFlightException:638847555497218356 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:27:29,966 27300322ms Service                MoveNext           - SearchFlightException:638847556049609393 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:30:05,287 27455644ms Service                MoveNext           - SearchFlightException:638847557602838958 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:30:35,948 27486304ms Service                MoveNext           - SearchFlightException:638847558354323639 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:30:51,117 27501474ms Service                MoveNext           - SearchFlightException:638847558506808097 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:31:04,713 27515069ms Service                MoveNext           - SearchFlightException:638847558641973505 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:37:42,822 27913178ms Service                MoveNext           - SearchFlightException:638847562621661907 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:40:12,317 28062674ms Service                MoveNext           - SearchFlightException:638847564117705282 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:40:13,302 28063658ms Service                MoveNext           - SearchFlightException:638847564127861250 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 21:48:56,231 28586588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:49:01,248 28591604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:49:06,216 28596573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:52:04,263 28774620ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:52:09,374 28779730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 21:52:14,437 28784793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 22:11:15,469 29925826ms Service                MoveNext           - SearchFlightException:638847582730798742 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:18:55,624 30385981ms Service                MoveNext           - SearchFlightException:638847587161324524 Running time: 19-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:19:04,216 30394572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 22:19:32,484 30422840ms Service                MoveNext           - SearchFlightException:638847587274650371 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:19:39,253 30429610ms Service                MoveNext           - SearchFlightException:638847587342175380 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:22:51,732 30622088ms Service                MoveNext           - SearchFlightException:638847589697166499 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:39:53,609 31643966ms Service                MoveNext           - SearchFlightException:638847599930313847 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:47:21,609 32091965ms Service                MoveNext           - SearchFlightException:638847604403277683 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 22:54:12,379 32502736ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-05 22:54:39,756 32530112ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-05 23:00:32,481 32882838ms Service                MoveNext           - SearchFlightException:638847612312319970 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:00:41,827 32892184ms Service                MoveNext           - SearchFlightException:638847612407954292 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:10:44,474 33494830ms Service                MoveNext           - SearchFlightException:638847617994542367 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:14:50,150 33740507ms Service                MoveNext           - SearchFlightException:638847620891974977 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:14:54,212 33744569ms Service                MoveNext           - SearchFlightException:638847620936966207 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:17:12,831 33883188ms Service                MoveNext           - SearchFlightException:638847622323320746 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-05 23:29:24,058 34614415ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 23:32:46,468 34816825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 23:32:51,766 34822122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-05 23:32:56,657 34827013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:13:44,505 55274862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:13:49,240 55279596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:13:54,365 55284722ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:14:32,985 55323341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:14:37,767 55328124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 05:14:42,668 55333025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 07:22:16,717 62987073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 07:22:21,889 62992246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 07:22:26,795 62997152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:08:44,610 65774966ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:26:54,304 66864661ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:41:50,575 67760932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:41:55,388 67765745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:42:00,404 67770761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:42:53,212 67823569ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 08:46:01,384 68011740ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 08:47:40,058 68110415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:47:45,121 68115477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:47:49,778 68120134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 08:54:42,568 68532925ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:10:36,040 69486397ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:10:40,197 69490553ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:11:00,215 69510571ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:12:06,940 69577296ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:13:36,681 69667038ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:13:50,404 69680760ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:15:32,786 69783143ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:22:15,577 70185934ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:22:20,156 70190513ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:22:26,954 70197310ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:30:31,310 70681666ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 09:33:21,060 70851417ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:33:26,062 70856418ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:35:27,605 70977962ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:54:26,536 72116892ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:55:20,291 72170647ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 09:55:56,513 72206870ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:05:29,059 72779415ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:05:32,997 72783353ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:05:53,442 72803798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:06:00,630 72810987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:06:08,397 72818753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:06:37,070 72847427ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:40:36,699 197514ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:40:43,808 204623ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:40:57,591 218406ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:44:28,084 428899ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:52:42,864 923679ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:53:19,915 960730ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:54:21,967 1022782ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 10:57:10,630 1191445ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 10:57:22,694 1203509ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 11:01:36,816 1457631ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 11:05:25,175 1685990ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 11:29:53,716 3154531ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 11:34:14,478 3415293ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-06 11:55:51,781 4712596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 11:55:56,844 4717658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 11:56:02,047 4722862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 12:33:09,499 6950314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 12:33:14,718 6955533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 12:33:19,719 6960533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:27:47,732 13828547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:32:37,028 14117843ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:32:42,106 14122921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:32:46,716 14127531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:45:36,779 14897594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:45:41,748 14902563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 14:45:46,812 14907626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 15:31:08,046 17628861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 15:31:13,084 17633899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 15:31:17,814 17638628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 15:59:25,339 19326154ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:25:23,760 20884574ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:45:08,823 22069638ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 16:45:18,949 22079764ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 16:45:52,093 22112908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:45:57,078 22117893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:46:02,156 22122971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:48:01,113 22241928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:48:06,082 22246897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 16:48:11,083 22251898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:17:33,924 27614739ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:23:07,946 27948761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:23:13,088 27953902ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:23:18,072 27958887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:24:25,563 28026378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:24:30,454 28031269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 18:24:35,423 28036238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 20:45:05,447 36466262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 20:45:10,810 36471625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 20:45:15,938 36476753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 21:36:07,436 39528250ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 21:53:38,096 40578911ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-06 22:49:25,321 43926136ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:49:32,463 43933277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:49:40,119 43940934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:50:43,110 44003925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:50:50,752 44011567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:50:58,861 44019676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:58:08,951 44449766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:58:17,014 44457829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-06 22:58:24,687 44465502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 05:32:30,392 68111207ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-07 08:03:13,322 77154137ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:04:44,128 77244943ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:30:41,360 78802175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:30:46,360 78807175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:30:51,157 78811972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:48:03,526 79844340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:48:11,667 79852482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 08:48:20,151 79860966ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 09:00:18,615 80579430ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-07 09:03:03,667 80744482ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-07 09:03:06,870 80747685ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-07 10:21:05,254 85426069ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 10:38:22,313 86463127ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 10:56:50,157 87570972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 10:56:55,593 87576408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 10:57:00,768 87581583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 11:50:09,627 90770442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 11:50:14,939 90775754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 11:50:20,080 90780895ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 11:54:48,012 91048827ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 12:59:40,276 94941091ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 12:59:45,322 94946137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 12:59:50,261 94951076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 14:26:31,792 100152607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 14:26:36,714 100157529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 14:26:41,496 100162311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 14:51:16,385 101637200ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:00:28,634 1381299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:01:13,123 1425787ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:01:21,671 1434335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:01:30,187 1442852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:11:17,864 2030529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:31:08,153 3220818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:31:13,013 3225678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:31:17,795 3230459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:36:56,174 3568838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:37:09,955 3582620ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 16:51:49,473 4462137ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:01:12,113 5024778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:01:17,411 5030075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:01:22,505 5035170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:04:52,439 5245104ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:19:13,195 6105860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:19:18,508 6111173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:19:23,758 6116423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:20:37,547 6190212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:20:42,938 6195602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:20:48,204 6200868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:44:50,519 7643184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:44:58,660 7651325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 17:45:06,818 7659482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 18:35:34,907 10687572ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 18:35:40,690 10693354ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 18:52:52,927 11725591ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 18:53:04,475 11737139ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 19:11:06,779 12819443ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:57:37,668 19210332ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:57:42,525 19215189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:57:47,519 19220183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:58:14,115 19246780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:58:19,209 19251874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 20:58:24,162 19256827ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 21:41:45,701 21858366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 21:41:52,935 21865599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 21:42:00,576 21873240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 21:58:41,688 22874353ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-07 22:36:38,565 25151230ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 22:58:40,210 26472875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 22:58:45,398 26478062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-07 22:58:50,398 26483063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 00:23:37,187 31569852ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:22:38,987 67511652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:22:47,033 67519697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:22:54,939 67527604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:28:41,346 67874011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:28:46,472 67879136ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:28:51,613 67884277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 10:33:00,073 68132737ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 11:20:17,440 70970104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 11:28:38,086 71470751ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 11:30:59,889 71612554ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 12:07:20,498 73793162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 12:09:06,568 73899232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 12:10:12,402 73965066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 12:22:07,941 74680606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 13:33:24,924 78957589ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 13:35:57,983 79110648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 13:36:02,984 79115648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 13:36:08,078 79120742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 14:14:21,795 81414459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:29:20,900 85913565ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:51:30,125 87242790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:51:35,454 87248118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:51:40,345 87253010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:55:14,079 87466744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:55:22,690 87475354ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 15:55:31,268 87483933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 16:06:17,182 88129847ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-08 19:48:06,794 101439459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 19:48:11,576 101444241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 19:48:16,514 101449179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:49:15,837 4301768ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-08 21:49:33,729 4319659ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:58:30,591 4856521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:58:38,513 4864444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:58:45,891 4871821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:59:00,515 4886445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:59:07,890 4893821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 21:59:15,735 4901665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 22:28:59,732 6685662ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-08 22:36:20,223 7126154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 22:36:25,100 7131030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 22:36:31,163 7137093ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 23:07:26,834 8992765ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 23:07:31,991 8997922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-08 23:07:37,007 9002938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 08:45:23,438 43669368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 08:45:28,468 43674399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 08:45:33,275 43679205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 09:52:32,633 47698564ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:08:06,493 48632423ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:22:55,053 49520983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:23:00,178 49526108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:23:06,194 49532125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:23:38,737 49564667ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:23:53,973 49579903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:23:55,738 49581669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:24:14,881 49600811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:24:17,709 49603639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:24:25,944 49611874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:24:43,711 49629642ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:24:52,259 49638189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:25:18,824 49664755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:26:22,314 49728245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:26:27,502 49733433ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:26:33,041 49738971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 10:52:20,534 51286464ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 11:30:37,699 53583629ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 11:30:56,201 53602131ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 11:31:36,018 53641948ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 11:42:37,843 54303773ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 11:42:44,390 54310320ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 11:42:55,453 54321384ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:14:44,779 56230709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:14:52,373 56238304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:15:00,545 56246476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:23:17,458 56743388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:23:24,942 56750873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:23:32,615 56758545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:38:02,390 57628320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:38:08,937 57634868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 12:38:14,141 57640071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:20:19,009 63764940ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 14:22:47,838 63913768ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 14:26:30,583 64136514ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-09 14:29:57,085 64343015ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:30:15,695 64361626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:31:38,639 64444570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:31:51,531 64457461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:31:58,751 64464681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:32:19,582 64485512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:32:33,303 64499233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:32:36,381 64502311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:33:12,976 64538906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:33:34,588 64560518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:33:41,791 64567722ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:34:24,093 64610024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:34:47,157 64633087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:34:49,610 64635541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:34:49,626 64635556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:34:49,657 64635587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:35:03,908 64649838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:35:19,425 64665356ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:37:39,594 64805525ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:54:11,955 65797886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:54:16,143 65802074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:54:20,190 65806121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:54:22,081 65808011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 14:54:26,128 65812058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:24:47,785 67633716ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:24:53,130 67639060ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:26:02,205 67708136ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:26:06,147 67712077ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:34:22,726 68208656ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:34:28,008 68213938ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:38:07,371 68433302ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:38:13,093 68439023ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 15:44:13,807 68799737ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 16:44:08,147 72394077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 16:58:23,366 73249297ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 17:22:04,405 74670335ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 17:22:08,437 74674367ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 18:17:47,311 78013241ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:30:59,913 89605844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:31:07,414 89613345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:31:15,665 89621596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:44:10,755 90396685ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:44:15,865 90401795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-09 21:44:20,772 90406702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:55:29,436 101875366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:55:36,873 101882804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:55:44,671 101890601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:57:11,256 101977187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:57:19,322 101985252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 00:57:28,775 101994705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 04:36:25,167 10715473ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 08:25:09,393 24439699ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 09:12:37,637 27287943ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:13:31,633 27341939ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:15:39,193 27469499ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:17:00,867 27551173ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 09:22:53,312 27903618ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:24:16,757 27987063ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 09:24:29,368 27999674ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 09:26:44,584 28134890ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:37:37,986 28788292ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:43:51,779 29162085ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:50:57,350 29587656ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:55:19,155 29849461ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 09:57:01,594 29951900ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:01:05,527 30195833ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:01:22,997 30213303ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:01:23,201 30213507ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:02:06,611 30256917ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:03:17,180 30327486ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:08:45,751 30656057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:08:50,769 30661075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:08:55,535 30665841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:11:46,816 30837122ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:15:36,477 31066783ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:22:41,619 31491925ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:22:51,620 31501926ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 10:34:17,321 32187627ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:38:32,855 32443161ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 10:43:52,648 32762954ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 11:28:05,126 35415432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 11:28:10,031 35420337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 11:28:14,938 35425244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:07:35,503 37785809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:07:40,300 37790606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:07:45,176 37795482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:19:51,844 38522150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:19:56,922 38527228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:20:01,876 38532182ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:22:35,950 38686256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:22:41,232 38691538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:22:46,576 38696882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:49:20,655 40290961ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:49:26,171 40296477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 12:49:31,156 40301462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 13:35:02,360 43032666ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 14:18:59,040 45669346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 14:25:45,641 46075947ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:38:26,025 46836331ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:39:16,717 46887023ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:41:56,893 47047199ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:46:33,053 47323359ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:48:16,669 47426975ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 14:59:49,339 48119645ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:18:42,170 49252476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:18:51,249 49261555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:19:00,264 49270570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:22:44,442 49494748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:22:52,117 49502423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:22:59,729 49510035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:23:49,091 49559397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:23:57,295 49567601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:24:05,170 49575476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 15:31:58,109 50048415ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 16:38:44,402 54054708ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 16:38:47,496 54057802ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 16:38:50,840 54061146ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 16:39:08,514 54078820ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 16:42:25,896 54276202ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 16:50:06,531 54736837ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 16:51:32,234 54822540ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:14:30,382 59800688ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:26:13,624 60503930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:26:56,645 60546951ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:26:59,754 60550060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:27:02,864 60553170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:27:17,854 60568160ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:27:20,964 60571270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:32:24,609 60874915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:33:00,771 60911077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:33:03,896 60914202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 18:33:06,959 60917265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:06:03,860 62894166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:06:09,484 62899790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:06:14,828 62905134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:08:36,810 63047116ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:08:53,183 63063489ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:32:34,615 64484921ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 19:35:17,883 64648189ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 19:35:26,882 64657188ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 19:54:25,652 65795958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:54:30,637 65800943ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:54:35,403 65805709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 19:56:00,956 65891262ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 19:56:04,472 65894778ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 19:56:07,800 65898106ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:00:15,087 66145393ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:02:54,993 66305299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:03:00,400 66310706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:03:05,322 66315628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:03:42,277 66352583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:03:47,981 66358287ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:03:53,310 66363616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 20:07:44,356 66594662ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:08:04,655 66614961ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:08:33,737 66644043ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:08:56,440 66666746ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:10:27,872 66758178ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:10:58,027 66788333ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:12:13,550 66863856ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:12:27,726 66878032ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:12:39,916 66890222ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:18:43,430 67253736ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:22:55,093 67505399ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:34:24,641 68194947ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:34:54,502 68224808ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:35:07,645 68237951ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:36:38,700 68329006ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:38:07,989 68418295ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:43:11,826 68722132ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 20:57:40,704 69591010ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-10 21:18:22,521 70832827ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:48:09,626 72619932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:48:14,782 72625088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:48:20,283 72630589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:50:11,432 72741738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:50:16,590 72746896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-10 21:50:21,685 72751991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:04:40,595 80810901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:04:45,594 80815900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:04:50,453 80820759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:07:09,716 80960022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:07:14,592 80964898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:07:19,378 80969684ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:16:28,072 81518378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:16:33,057 81523363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:16:38,042 81528348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:19:37,446 81707752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:19:42,212 81712518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 00:19:47,837 81718143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 06:12:22,172 102872478ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-11 07:13:52,240 2153332ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 07:13:57,333 2158426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 07:14:02,114 2163207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:25:36,267 6457360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:25:51,050 6472142ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:25:53,925 6475018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:26:02,613 6483706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:33:28,919 6930012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:33:35,451 6936544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:33:49,311 6950404ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:33:49,311 6950404ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:35:14,633 7035726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:36:01,855 7082948ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 08:58:54,242 8455334ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 10:31:49,980 14031072ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:12:54,742 16495834ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:15:41,236 16662329ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:21:55,733 17036825ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:22:25,519 17066611ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:22:51,974 17093067ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:28:08,009 17409102ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 11:32:12,630 17653722ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:00:31,428 19352520ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:00:42,023 19363115ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:03:38,988 19540081ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-11 12:05:24,754 19645847ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-11 12:09:29,818 19890910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:09:34,880 19895972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:09:39,887 19900980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:22:54,828 20695921ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-11 12:48:11,284 22212376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:48:16,472 22217565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:48:21,441 22222533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:58:39,814 22840906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:58:44,752 22845845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 12:58:49,643 22850736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 13:45:36,771 25657864ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-11 13:58:05,244 26406337ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 13:58:15,573 26416666ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:08:07,003 27008096ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:16:58,980 27540072ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:18:34,394 27635486ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:34:47,462 28608554ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:34:59,760 28620852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:35:07,448 28628541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:35:31,247 28652339ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:38:29,659 28830752ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:38:49,823 28850916ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:38:58,215 28859308ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:58:19,371 30020464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:58:25,137 30026229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 14:58:36,998 30038090ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:18:04,685 31205778ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:28:44,655 31845748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:28:49,740 31850832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:28:54,990 31856083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:36:22,037 32303129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:36:27,069 32308162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 15:36:31,662 32312755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:00:38,390 33759482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:00:46,640 33767733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:00:53,281 33774374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:01:19,221 33800314ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:07:53,625 34194718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:07:58,502 34199594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:08:03,595 34204687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:14:00,823 34561915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:14:05,980 34567073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:14:10,809 34571901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:20:05,707 34926800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:20:10,551 34931644ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:20:15,333 34936426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:21:04,198 34985291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:21:09,151 34990244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:21:14,604 34995697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:24:01,496 35162589ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:45:37,941 36459034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:45:45,959 36467052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:45:53,322 36474415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:57:06,799 37147891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:57:11,830 37152923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 16:57:16,924 37158017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 17:29:55,810 39116903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 17:30:01,013 39122106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 17:30:06,029 39127122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 18:43:30,020 43531112ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:03:48,741 48349834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:03:53,926 48355018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:03:58,769 48359861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:15:12,119 49033211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:15:21,008 49042101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:15:28,821 49049914ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:22:28,815 49469907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:22:37,417 49478509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 20:22:45,480 49486573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:02:50,276 51891368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:02:55,323 51896415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:03:00,058 51901151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:30:37,310 53558403ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:55:30,886 55051979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:55:31,713 55052805ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:55:38,789 55059881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:55:48,040 55069132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:56:38,138 55119230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:56:46,123 55127216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:56:53,905 55134998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:57:39,003 55180095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:57:46,847 55187940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-11 21:57:53,969 55195062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 00:04:16,231 62777324ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 00:04:29,082 62790174ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 00:08:11,281 63012373ms Service                MoveNext           - SearchFlightException:638852836911581994 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 00:08:21,256 63022349ms Service                MoveNext           - SearchFlightException:638852837011720442 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 00:08:31,892 63032984ms Service                MoveNext           - SearchFlightException:638852837113504333 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 00:32:56,756 64497849ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 00:54:01,976 65763069ms Service                MoveNext           - SearchFlightException:638852864410079945 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 00:54:07,571 65768663ms Service                MoveNext           - SearchFlightException:638852864464773809 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 00:54:11,915 65773007ms Service                MoveNext           - SearchFlightException:638852864510089186 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 01:03:00,622 66301714ms Service                MoveNext           - SearchFlightException:638852869356002190 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 02:03:11,520 69912613ms Service                MoveNext           - SearchFlightException:638852905909425609 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:11:22,748 81203840ms Service                MoveNext           - SearchFlightException:638853018813255796 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:14:00,183 81361276ms Service                MoveNext           - SearchFlightException:638853020391520328 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:26:07,586 82088679ms Service                MoveNext           - SearchFlightException:638853027667905454 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:28:51,430 82252523ms Service                MoveNext           - SearchFlightException:638853029313482149 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:58:22,105 84023198ms Service                MoveNext           - SearchFlightException:638853047006056269 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 05:58:24,152 84025245ms Service                MoveNext           - SearchFlightException:638853047026059342 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 06:06:51,624 84532717ms Service                MoveNext           - SearchFlightException:638853052106384595 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 06:07:21,828 84562920ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 06:07:46,542 84587634ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 07:20:10,801 88931894ms Service                MoveNext           - SearchFlightException:638853096101612924 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:20:16,802 88937894ms Service                MoveNext           - SearchFlightException:638853096163180224 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:20:23,788 88944880ms Service                MoveNext           - SearchFlightException:638853096236625728 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:25:42,824 89263916ms Service                MoveNext           - SearchFlightException:638853099423867157 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:29:05,573 89466666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 07:29:10,542 89471635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 07:29:15,511 89476604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 07:33:41,100 89742192ms Service                MoveNext           - SearchFlightException:638853104206625813 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:33:50,756 89751849ms Service                MoveNext           - SearchFlightException:638853104302263102 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:42:00,973 90242066ms Service                MoveNext           - SearchFlightException:638853109204895589 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:50:56,747 90777839ms Service                MoveNext           - SearchFlightException:638853114558098724 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:54:09,454 90970547ms Service                MoveNext           - SearchFlightException:638853116483912308 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 07:58:11,157 91212250ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 07:58:15,782 91216874ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:00:18,473 91339566ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:02:49,691 91490783ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:02:59,333 91500426ms Service                MoveNext           - SearchFlightException:638853121788647077 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:06:33,165 91714257ms Service                MoveNext           - SearchFlightException:638853123927290572 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:07:04,682 91745774ms Service                MoveNext           - SearchFlightException:638853124236515443 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:08:29,735 91830828ms Service                MoveNext           - SearchFlightException:638853125096421183 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:08:42,518 91843610ms Service                MoveNext           - SearchFlightException:638853125220180264 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:14:16,449 92177542ms Service                MoveNext           - SearchFlightException:638853128559653215 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:14:45,124 92206216ms Service                MoveNext           - SearchFlightException:638853128846564142 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:18:32,144 92433237ms Service                MoveNext           - SearchFlightException:638853131116153516 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:19:47,042 92508134ms Service                MoveNext           - SearchFlightException:638853131865730785 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:24:05,227 92766320ms Service                MoveNext           - SearchFlightException:638853134438997929 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:24:18,558 92779650ms Service                MoveNext           - SearchFlightException:638853134580110496 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:29:32,726 93093819ms Service                MoveNext           - SearchFlightException:638853137726329829 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:34:26,858 93387951ms Service                MoveNext           - SearchFlightException:638853140653743544 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 08:38:38,602 93639695ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:39:07,263 93668356ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:58:18,191 94819284ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 08:58:35,991 94837083ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:01:51,879 95032971ms Service                MoveNext           - SearchFlightException:638853157017993749 Running time: 10-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:02:00,082 95041175ms Service                MoveNext           - SearchFlightException:638853157138644275 Running time: 6-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:04:16,125 95177218ms Service                MoveNext           - SearchFlightException:638853158507661369 Running time: 5-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:10:30,591 95551683ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:10:35,605 95556698ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:11:20,703 95601796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:11:28,235 95609328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:11:36,751 95617844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:13:15,667 95716759ms Service                MoveNext           - SearchFlightException:638853163932782624 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:13:22,464 95723557ms Service                MoveNext           - SearchFlightException:638853164019331457 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:15:34,718 95855811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:15:39,656 95860748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:15:45,182 95866275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:16:26,264 95907357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:16:30,851 95911943ms Service                MoveNext           - SearchFlightException:638853165886245112 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:16:31,976 95913069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:16:36,843 95917936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:19:28,044 96089137ms Service                MoveNext           - SearchFlightException:638853167676253823 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:25:44,376 96465469ms Service                MoveNext           - SearchFlightException:638853171443147895 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:28:31,000 96632093ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:31:05,832 96786924ms Service                MoveNext           - SearchFlightException:638853174644256632 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:31:29,286 96810378ms Service                MoveNext           - SearchFlightException:638853174886921960 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:34:28,249 96989342ms Service                MoveNext           - SearchFlightException:638853176676865401 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:35:52,584 97073677ms Service                MoveNext           - SearchFlightException:638853177521004855 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:36:04,726 97085818ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:36:52,215 97133307ms Service                MoveNext           - SearchFlightException:638853178118405727 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:37:01,345 97142438ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:37:07,893 97148985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:37:13,034 97154126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:37:26,458 97167551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:37:31,473 97172566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:37:37,755 97178847ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:38:48,702 97249795ms Service                MoveNext           - SearchFlightException:638853179270928061 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:42:34,912 97476004ms Service                MoveNext           - SearchFlightException:638853181543491565 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:42:40,818 97481910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:42:48,428 97489521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:42:56,054 97497146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:46:08,400 97689493ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:46:16,665 97697758ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:46:23,994 97705087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:47:38,907 97780000ms Service                MoveNext           - SearchFlightException:638853184533446383 Running time: 5-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:48:04,410 97805503ms Service                MoveNext           - SearchFlightException:638853184822069253 Running time: 2-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:48:29,975 97831067ms Service                MoveNext           - SearchFlightException:638853185094903860 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:48:33,006 97834099ms Service                MoveNext           - SearchFlightException:638853185124438924 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:48:57,023 97858116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:49:05,206 97866298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:49:13,082 97874174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 09:49:58,164 97919256ms Service                MoveNext           - SearchFlightException:638853185975872087 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:50:00,836 97921929ms Service                MoveNext           - SearchFlightException:638853186004300502 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:50:10,134 97931226ms Service                MoveNext           - SearchFlightException:638853186095870836 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:50:24,168 97945260ms Service                MoveNext           - SearchFlightException:638853186240430600 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:57:13,866 98354959ms Service                MoveNext           - SearchFlightException:638853190329636532 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:58:04,397 98405490ms Service                MoveNext           - SearchFlightException:638853190829595175 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:59:49,690 98510782ms Service                MoveNext           - SearchFlightException:638853191446839275 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:59:51,502 98512595ms Service                MoveNext           - SearchFlightException:638853191464964896 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 09:59:58,675 98519767ms Service                MoveNext           - SearchFlightException:638853191934557146 Running time: 5-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:00,252 98521344ms Service                MoveNext           - SearchFlightException:638853191552390574 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:07,129 98528222ms Service                MoveNext           - SearchFlightException:638853191621221883 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:37,771 98558864ms Service                MoveNext           - SearchFlightException:638853191927525311 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:38,334 98559427ms Service                MoveNext           - SearchFlightException:638853191933148440 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:38,396 98559489ms Service                MoveNext           - SearchFlightException:638853191933774288 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:38,499 98559591ms Service                MoveNext           - SearchFlightException:638853191934715701 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:39,428 98560521ms Service                MoveNext           - SearchFlightException:638853191943936213 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:45,850 98566943ms Service                MoveNext           - SearchFlightException:638853192008310682 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:47,632 98568724ms Service                MoveNext           - SearchFlightException:638853192026119724 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:48,007 98569099ms Service                MoveNext           - SearchFlightException:638853192414749829 Running time: 6-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:48,772 98569865ms Service                MoveNext           - SearchFlightException:638853192337401258 Running time: 15-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:48,772 98569865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:00:48,929 98570021ms Service                MoveNext           - SearchFlightException:638853192389124831 Running time: 10-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:49,116 98570209ms Service                MoveNext           - SearchFlightException:638853192316929413 Running time: 17-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:52,835 98573928ms Service                MoveNext           - SearchFlightException:638853192527418226 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:53,304 98574397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:00:54,460 98575553ms Service                MoveNext           - SearchFlightException:638853192094422500 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:00:56,007 98577100ms Service                MoveNext           - SearchFlightException:638853192335371237 Running time: 22-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:01:12,197 98593290ms Service                MoveNext           - SearchFlightException:638853192271769958 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:01:18,447 98599539ms Service                MoveNext           - SearchFlightException:638853192334430979 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:02:25,234 98666327ms Service                MoveNext           - SearchFlightException:638853193451250913 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:10:56,984 99178077ms Service                MoveNext           - SearchFlightException:638853198565626872 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:12:28,796 99269889ms Service                MoveNext           - SearchFlightException:638853199483274836 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:18:07,676 99608769ms Service                MoveNext           - SearchFlightException:638853202793622480 Running time: 8-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:19:57,377 99718469ms Service                MoveNext           - SearchFlightException:638853203847979020 Running time: 12-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:23:05,623 99906715ms Service                MoveNext           - SearchFlightException:638853205850917995 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:44:10,030 101171122ms Service                MoveNext           - SearchFlightException:638853218434201466 Running time: 6-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:44:21,845 101182937ms Service                MoveNext           - SearchFlightException:638853218613308275 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:44:44,799 101205892ms Service                MoveNext           - SearchFlightException:638853218847057173 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:44:48,112 101209205ms Service                MoveNext           - SearchFlightException:638853218828151972 Running time: 5-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:44:49,831 101210924ms Service                MoveNext           - SearchFlightException:638853218893313859 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:47:18,064 101359157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:47:27,565 101368657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:47:35,676 101376769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:48:27,846 101428938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:48:35,457 101436550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:48:43,147 101444240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 10:49:23,167 101484259ms Service                MoveNext           - SearchFlightException:638853221626983337 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:49:27,793 101488886ms Service                MoveNext           - SearchFlightException:638853221673859431 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:49:33,355 101494447ms Service                MoveNext           - SearchFlightException:638853221728554488 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:49:35,042 101496135ms Service                MoveNext           - SearchFlightException:638853221745272139 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:49:46,765 101507857ms Service                MoveNext           - SearchFlightException:638853221862327873 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:57:20,971 101962064ms Service                MoveNext           - SearchFlightException:638853225959350598 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:36,010 102097103ms Service                MoveNext           - SearchFlightException:638853227309912983 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:36,291 102097384ms Service                MoveNext           - SearchFlightException:638853227312722941 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:38,120 102099212ms Service                MoveNext           - SearchFlightException:638853227331004603 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:53,012 102114104ms Service                MoveNext           - SearchFlightException:638853227479925579 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:53,012 102114104ms Service                MoveNext           - SearchFlightException:638853227480082141 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 10:59:59,044 102120136ms Service                MoveNext           - SearchFlightException:638853227540242612 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:03,825 102124918ms Service                MoveNext           - SearchFlightException:638853227588058343 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:16,092 102137184ms Service                MoveNext           - SearchFlightException:638853227710742200 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:16,889 102137981ms Service                MoveNext           - SearchFlightException:638853227718729837 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:21,577 102142669ms Service                MoveNext           - SearchFlightException:638853227765575231 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:21,717 102142810ms Service                MoveNext           - SearchFlightException:638853227766985739 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:00:35,922 102157014ms Service                MoveNext           - SearchFlightException:638853227908870004 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:10:53,221 102774314ms Service                MoveNext           - SearchFlightException:638853234527526546 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:12:09,994 102851086ms Service                MoveNext           - SearchFlightException:638853235295720527 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:12:19,713 102860806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:12:27,933 102869025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:12:34,137 102875229ms Service                MoveNext           - SearchFlightException:638853235537151177 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:12:35,668 102876760ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:12:39,168 102880261ms Service                MoveNext           - SearchFlightException:638853235586216374 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:12:43,106 102884198ms Service                MoveNext           - SearchFlightException:638853235626847892 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:17:09,781 103150874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:17:15,829 103156921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:17:21,173 103162266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:18:26,366 103227459ms Service                MoveNext           - SearchFlightException:638853239059291401 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:18:32,226 103233319ms Service                MoveNext           - SearchFlightException:638853239116797034 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:18:35,414 103236507ms Service                MoveNext           - SearchFlightException:638853239149923544 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:18:43,493 103244586ms Service                MoveNext           - SearchFlightException:638853239229308845 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:13,633 103814726ms Service                MoveNext           - SearchFlightException:638853244486252023 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:32,681 103833774ms Service                MoveNext           - SearchFlightException:638853244676617077 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:37,041 103838133ms Service                MoveNext           - SearchFlightException:638853244720214106 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:45,573 103846666ms Service                MoveNext           - SearchFlightException:638853244805536067 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:45,995 103847087ms Service                MoveNext           - SearchFlightException:638853244809908641 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:51,495 103852588ms Service                MoveNext           - SearchFlightException:638853244864755863 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:28:53,855 103854948ms Service                MoveNext           - SearchFlightException:638853244888508399 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:29:04,606 103865698ms Service                MoveNext           - SearchFlightException:638853244995716686 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:29:05,122 103866214ms Service                MoveNext           - SearchFlightException:638853245001028825 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:29:10,216 103871308ms Service                MoveNext           - SearchFlightException:638853245051970986 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:32:23,049 104064142ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:32:35,893 104076986ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 11:33:56,572 104157665ms Service                MoveNext           - SearchFlightException:638853248361350333 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:33:58,697 104159790ms Service                MoveNext           - SearchFlightException:638853248372121767 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:34:31,888 104192981ms Service                MoveNext           - SearchFlightException:638853248714183699 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:37:32,821 104373914ms Service                MoveNext           - SearchFlightException:638853250077867353 Running time: 45-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:43:57,871 355593ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 11:45:11,658 429381ms Service                MoveNext           - SearchFlightException:638853255102684664 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:45:28,161 445883ms Service                MoveNext           - SearchFlightException:638853255272861419 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:45:30,020 447742ms Service                MoveNext           - SearchFlightException:638853255286452107 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:54:13,163 970885ms Service                MoveNext           - SearchFlightException:638853260518968144 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:55:41,546 1059269ms Service                MoveNext           - SearchFlightException:638853261402500077 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 11:56:05,355 1083077ms Service                MoveNext           - SearchFlightException:638853261652775192 Running time: 0-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 12:06:37,177 1714899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 12:06:42,236 1719959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 12:06:47,315 1725037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 12:06:55,331 1733053ms Service                MoveNext           - SearchFlightException:638853268143312351 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 12:07:56,367 1794090ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 12:23:15,742 2713465ms Service                MoveNext           - SearchFlightException:638853277938208331 Running time: 1-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Helpers.PromotionHelper.ApplyHardCodeVNAPromotionForSearchFlightResult(VNASearchFlightResult searchFlightResult, VNASearchFlightCriteria criteria)
   at VietnamAirlines.ServiceLibrary.Service.<SearchFlight>d__2.MoveNext()
ERROR 2025-06-12 13:40:49,490 4596744ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 13:41:11,304 4618558ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 13:50:11,586 5158840ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 13:53:10,569 5337823ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 14:19:44,945 6932199ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 14:28:47,747 7475001ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 14:29:16,437 7503691ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 14:29:31,344 7518598ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 14:45:12,028 8459282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 14:45:21,859 8469112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 14:45:26,819 8474073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 14:52:18,327 8885581ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 14:54:35,161 9022415ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 15:47:20,458 323863ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 15:47:55,504 358909ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 15:53:32,860 696264ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 15:55:34,561 817965ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 15:55:51,151 834556ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 16:02:09,375 1212779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:02:14,235 1217639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:02:19,189 1222593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:05:35,432 1418836ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:05:40,440 1423844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:05:45,453 1428857ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 16:08:40,500 1603904ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 16:12:16,495 1819899ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 16:12:39,028 1842433ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 16:25:25,455 2608860ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 16:53:18,451 4281856ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 17:00:41,292 4724696ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:00:45,948 4729353ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:06:34,663 5078067ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:21:58,133 6001538ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:25:15,480 6198885ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 17:34:26,186 6749591ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:35:36,879 6820284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:35:41,567 6824971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:35:46,613 6830018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:36:04,302 6847706ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:25,885 7589289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:30,588 7593993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:32,260 7595665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:35,573 7598978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:41,042 7604446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 17:48:49,434 7612838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 18:18:34,607 9398011ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 18:22:33,036 9636440ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 18:40:48,629 10732033ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 19:03:36,848 12100253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 19:03:41,943 12105347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 19:03:46,865 12110269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 19:20:59,183 13142587ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 19:42:01,450 14404854ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 19:45:55,812 14639216ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 19:46:03,875 14647279ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 19:46:17,516 14660921ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 20:01:58,467 15601871ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:02:01,873 15605278ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:03:33,132 15696536ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:05:37,862 15821267ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 20:13:40,254 16303659ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-12 20:42:07,783 18011188ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:46:12,113 18255517ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:46:24,770 18268175ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:49:46,537 18469941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:49:51,772 18475176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 20:49:56,836 18480240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:50:34,416 22117820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:50:37,494 22120899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:50:40,604 22124008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:53:09,351 22272755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:53:55,231 22318635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:54:52,408 22375812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:55:06,018 22389422ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:55:11,394 22394798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:55:38,271 22421675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:56:29,979 22473383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:56:35,448 22478852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:56:48,497 22491902ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:56:49,060 22492465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:56:54,419 22497824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:57:07,310 22510715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:57:21,312 22524716ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:57:22,765 22526169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:13,035 22576439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:31,537 22594941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:32,099 22595503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:35,130 22598534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:37,459 22600864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:58:50,335 22613739ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:59:05,792 22629197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:59:26,823 22650228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:59:53,403 22676808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 21:59:56,075 22679480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:14,577 22697982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:18,171 22701576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,235 22706639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,250 22706654ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,359 22706763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,422 22706826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,500 22706904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,594 22706998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:23,657 22707061ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:24,531 22707936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:26,375 22709780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:26,485 22709889ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:26,735 22710139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:30,876 22714280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:30,891 22714295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:30,954 22714358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:30,954 22714358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:34,063 22717468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:34,063 22717468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:42,948 22726353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:00:42,964 22726369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:01:25,093 22768498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:01:39,438 22782842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:02:08,893 22812298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:02:20,771 22824176ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:02:27,646 22831050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:02:46,991 22850395ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:04:58,076 22981480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:01,185 22984590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:04,311 22987715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:10,905 22994309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:13,999 22997403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:17,077 23000482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:30,392 23013796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:31,126 23014530ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:33,470 23016874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:34,236 23017640ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:36,565 23019969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:05:37,362 23020766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:02,884 23046288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:06,007 23049412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:09,133 23052537ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:20,524 23063929ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:23,634 23067038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:26,744 23070148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:41,886 23085290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:45,058 23088462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:06:48,168 23091572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:16,900 23240304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:20,025 23243430ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:23,151 23246555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:34,839 23258244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:37,949 23261353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:09:41,075 23264479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:12:10,932 23414337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:12:14,057 23417461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:12:17,166 23420570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:15:07,340 23590744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:15:11,418 23594822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:15:14,543 23597947ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:39,255 24042659ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:39,364 24042769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:42,380 24045784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:42,489 24045894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:45,521 24048925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 22:22:45,599 24049004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-12 23:06:58,680 26702084ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:03:15,212 30078616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:03:18,929 30082334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:03:35,962 30099366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:04:19,060 30142464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:04:33,124 30156528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:04:59,599 30183004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:04:59,626 30183030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:13,206 30196611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:16,805 30200209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:27,551 30210955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:51,805 30235209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:52,088 30235493ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:52,102 30235507ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:05:55,521 30238925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:07,008 30250412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:12,465 30255870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:16,418 30259822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:21,664 30265069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:44,261 30287665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:55,417 30298822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:06:58,891 30302295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:10,967 30314371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:13,733 30317137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:36,140 30339545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:36,140 30339545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:36,270 30339675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:39,254 30342658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:39,391 30342795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:39,984 30343389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:07:42,363 30345767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:08:05,520 30368924ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:08:28,615 30392019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:08:34,146 30397550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:08:49,881 30413286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:08:57,788 30421193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:09:20,482 30443887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:09:20,482 30443887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:09:23,591 30446996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:09:40,223 30463627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:10:13,003 30496407ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:10:28,426 30511830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:10:31,535 30514940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:11:20,476 30563880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:11:23,604 30567009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:11:57,574 30600978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:12:06,808 30610212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:12:12,205 30615609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:12:49,468 30652872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:12:49,656 30653060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:13:04,564 30667968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:13:41,693 30705097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:02,199 30785603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:25,779 30809184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:26,139 30809543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:42,828 30826232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:42,828 30826232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:15:47,735 30831139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:16:17,926 30861331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:16:18,347 30861751ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:16:31,473 30874877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:17:32,603 30936008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:18:04,435 30967840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:18:25,921 30989325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:19:54,652 31078056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:20:10,623 31094027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:20:41,330 31124734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:22:29,525 31232930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:22:45,499 31248903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:23:16,107 31279511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:23:19,827 31283231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:23:42,708 31306112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:24:11,283 31334688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:24:11,283 31334688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:24:24,160 31347564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:25:00,354 31383758ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:27:07,740 31511145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:27:40,712 31544117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:27:55,857 31559261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:28:32,791 31596195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:28:47,674 31611078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:28:50,466 31613870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:28:57,576 31620980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:29:25,143 31648547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:29:44,454 31667858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:30:26,395 31709799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:30:29,473 31712878ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:30:32,602 31716006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:32:01,639 31805043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:32:07,171 31810575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:32:16,578 31819982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:32:57,471 31860876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:33:08,394 31871798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:33:46,056 31909460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:34:51,794 31975198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:35:04,607 31988012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:35:07,752 31991156ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:45:28,599 32612003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:45:56,610 32640014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:45:59,734 32643138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:51:13,934 32957338ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:51:19,763 32963167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 00:51:28,848 32972252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:25:59,815 35043220ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:26:13,985 35057389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:26:28,860 35072264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:27:29,194 35132598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:27:32,303 35135707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:27:58,477 35161882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:30:20,772 35304177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:30:38,632 35322037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:30:48,477 35331881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:31:29,153 35372558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:32:05,999 35409404ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:32:20,204 35423608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:32:58,301 35461705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:33:05,804 35469209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:33:16,271 35479676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:16,793 35540197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:22,379 35545783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:25,824 35549229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:32,856 35556261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:56,922 35580326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:34:56,922 35580326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:35:34,956 35618360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:35:49,083 35632488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:35:49,146 35632550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:36:04,208 35647613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:36:06,443 35649848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:36:41,228 35684632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:03,847 35707251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:03,847 35707251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:08,215 35711619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:08,465 35711869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:11,309 35714713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:37:24,921 35728326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:13,299 35776704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:15,486 35778891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:26,174 35789578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:29,878 35793283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:29,878 35793283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:44,535 35807939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:47,567 35810971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:38:53,319 35816723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:03,963 35827367ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:18,461 35841865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:32,008 35855413ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:33,227 35856632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:33,790 35857194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:48,932 35872336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:48,932 35872336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:39:56,151 35879556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:05,701 35889106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:11,231 35894635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:27,556 35910961ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:30,676 35914081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:48,416 35931821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:40:49,744 35933148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:04,656 35948060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:07,278 35950683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:07,734 35951138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:40,483 35983888ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:40,499 35983903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:41:54,032 35997436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:42:32,944 36036349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:42:49,460 36052864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:42:49,460 36052864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:43:25,619 36089023ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:43:41,869 36105274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:43:43,088 36106493ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:43:44,947 36108352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:43:48,062 36111467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:44:42,984 36166388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:44:47,813 36171217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:45:09,955 36193360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:45:09,955 36193360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:45:26,380 36209784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:45:29,005 36212409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:46:02,085 36245489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:46:19,823 36263227ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:46:37,451 36280855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:47:47,174 36350578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:48:04,596 36368000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:48:39,241 36402645ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:49:51,625 36475030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:50:24,517 36507921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:50:28,703 36512107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:51:16,056 36559460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:51:31,145 36574550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:51:39,224 36582629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:53:00,405 36663809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:53:12,454 36675858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:53:17,436 36680841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:53:38,313 36701718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:53:53,579 36716984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:54:09,584 36732989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:55:53,841 36837246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:56:11,267 36854671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:56:30,345 36873749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:56:48,159 36891563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:56:51,268 36894673ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:57:07,239 36910643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:57:38,382 36941786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:58:14,042 36977447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 01:58:23,581 36986985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:08:59,244 37622648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:09:34,637 37658042ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:09:51,812 37675217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:10:11,708 37695112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:10:29,048 37712453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:10:46,473 37729878ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:52:20,286 40223691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:52:31,819 40235224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:52:43,007 40246411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:54:25,048 40348452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:54:33,471 40356875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 02:54:57,143 40380547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:51:12,815 43756219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:51:18,346 43761750ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:51:21,439 43764844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:51:57,100 43800504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:52:12,554 43815958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:52:35,104 43838509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:58:14,745 44178149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:58:27,655 44191060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 03:59:04,654 44228059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:02:10,786 44414191ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:02:27,314 44430718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:02:38,961 44442365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:08:16,985 44780390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:08:40,225 44803630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:09:06,866 44830270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:16:04,691 45248096ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:16:16,678 45260083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:16:32,726 45276131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:18:17,578 45380982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:18:44,520 45407924ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:19:09,911 45433316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:20:28,824 45512229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:20:54,175 45537579ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:21:11,829 45555233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:22:18,741 45622145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:22:38,664 45642069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:22:44,213 45647617ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:24:50,050 45773455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:24:53,770 45777175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:25:16,209 45799613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:26:09,635 45853039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:26:34,311 45877716ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:27:01,193 45904597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:29:10,536 46033941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:29:13,627 46037031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:29:31,284 46054688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:29:37,909 46061313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:30:02,615 46086019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:30:14,150 46097554ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:34:03,011 46326415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:34:23,419 46346823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:34:41,093 46364497ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:36:06,710 46450114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:36:36,056 46479460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:37:02,606 46506010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:44:54,586 46977991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:45:08,134 46991539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 04:45:19,854 47003259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:01:51,588 47994993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:01:54,685 47998089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:02:19,418 48022822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:06:16,190 48259594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:06:29,676 48273080ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:06:48,631 48292035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:06:57,870 48301275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:07:07,118 48310522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:07:21,868 48325272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:09:20,144 48443548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:09:43,396 48466801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:10:09,884 48493289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:11:01,950 48545355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:11:27,782 48571186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:11:54,486 48597891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:12:33,349 48636753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:12:46,535 48649939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:12:49,755 48653159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:12:52,048 48655452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:12:52,842 48656247ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:13:11,957 48675361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:13:56,270 48719674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:14:31,822 48755226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:14:31,822 48755226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:14:34,898 48758302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:14:34,914 48758318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:14:56,400 48779805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:21:30,749 49174153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:21:47,219 49190624ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:21:54,454 49197858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:21:57,579 49200983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:22:14,114 49217518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:22:23,411 49226816ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:23:15,605 49279009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:23:34,244 49297649ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:23:38,714 49302118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:23:38,714 49302118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:23:56,403 49319807ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:24:08,162 49331566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:24:31,807 49355211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:24:48,011 49371415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:25:00,184 49383588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:30:13,618 49697023ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:30:21,172 49704576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:30:36,106 49719510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:31:20,515 49763919ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:31:23,625 49767029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:31:29,938 49773342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:32:03,441 49806845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:32:21,130 49824534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:32:50,134 49853538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:39:22,043 50245448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:39:25,185 50248589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:39:47,904 50271309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:41:32,181 50375585ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:41:35,274 50378679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:41:38,384 50381788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:46:30,331 50673735ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:46:45,599 50689004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:47:02,428 50705832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:47:37,868 50741273ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:55:32,246 51215651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:55:49,293 51232698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 05:55:52,403 51235807ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:02:24,273 51627678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:02:31,274 51634678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:02:54,715 51658119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:04:50,052 51773456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:05:01,914 51785318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:05:15,009 51798413ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:14:41,469 52364874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:14:55,267 52378672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:15:04,956 52388360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:15:40,850 52424254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:15:51,163 52434567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:16:28,323 52471727ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:17:33,875 52537280ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:18:00,473 52563877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:18:09,973 52573377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:18:13,098 52576502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:18:49,945 52613349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:18:53,070 52616474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:19:05,431 52628835ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:19:57,741 52681146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:20:20,105 52703509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:20:34,840 52718244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:28:46,538 53209942ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:29:24,033 53247437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:29:40,551 53263955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:29:58,147 53281551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:30:51,494 53334899ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:31:48,311 53391716ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:39:43,049 53866454ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:40:08,691 53892095ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:44:58,361 54181766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:45:16,020 54199424ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:45:40,990 54224395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:46:56,325 54299729ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:46:59,403 54302807ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:48:18,082 54381486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:48:21,207 54384611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:48:24,317 54387721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:48:43,568 54406973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:49:10,524 54433928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:49:33,448 54456852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:51:17,707 54561112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:51:47,616 54591020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:52:10,931 54614335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:58:32,456 54995861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:58:50,328 55013733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 06:59:11,701 55035106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:00:08,363 55091768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:00:31,411 55114815ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:00:34,489 55117894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:05:44,985 55428390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:06:02,471 55445876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:06:36,974 55480379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:17:46,820 56150224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:17:52,430 56155834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:17:58,556 56161960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:47:19,956 57923361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:47:21,381 57924785ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:47:25,398 57928803ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 07:47:30,743 57934147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 08:01:07,102 58750507ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 08:12:55,333 59458738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 08:13:03,756 59467161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 08:13:12,084 59475488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 08:59:20,055 62243460ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:20:59,827 63543232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:21:05,766 63549170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:21:12,908 63556312ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:37:03,831 64507236ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:50:22,938 65306342ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:53:14,999 65478403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:53:20,031 65483435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:53:25,377 65488781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 09:56:41,637 65685041ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:24:48,805 67372210ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:25:22,386 67405790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:26:27,219 67470624ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:30:14,131 67697535ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:30:20,024 67703429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:30:25,132 67708536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 10:52:34,015 69037419ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 10:55:54,080 69237484ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 11:33:50,707 71514112ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 11:38:47,614 71811019ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 11:46:05,082 72248487ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 11:51:19,567 72562972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 11:51:24,662 72568066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 11:51:29,662 72573067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 12:23:31,203 74494607ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 12:23:38,313 74501717ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 13:54:34,556 79957960ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:07:16,329 80719734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:07:21,377 80724781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:07:26,534 80729938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:16:09,700 81253104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:16:14,872 81258276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 14:16:20,169 81263574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:01:06,026 83949430ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:03:05,660 84069065ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:03:13,489 84076894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:03:21,256 84084660ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:04:50,983 84174388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:04:58,734 84182139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:05:06,734 84190138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:38:25,226 86188631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:38:33,321 86196725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:38:40,776 86204180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 15:57:02,514 87305919ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:17:55,276 88558681ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:34:03,170 89526574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:34:08,279 89531684ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:34:13,483 89536887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:36:45,481 89688886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:36:50,138 89693542ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:36:55,310 89698714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 16:59:41,312 1288325ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:06:17,940 1684953ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:09:27,243 1874256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 17:09:32,728 1879741ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 17:09:37,775 1884788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 17:11:45,594 2012607ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:14:30,236 2177249ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:14:43,206 2190219ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:14:58,051 2205063ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:15:43,446 2250459ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:17:21,705 2348718ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:24:50,380 2797393ms Service                MoveNext           - Running time: 5-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<ValidateSeatMap>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<ValidateSeatMap>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-06-13 17:36:39,681 3506694ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:37:21,872 3548885ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:38:39,926 3626939ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:42:33,616 3860628ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:45:42,351 4049364ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:53:21,631 4508644ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:53:54,835 4541848ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:54:12,119 4559132ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:54:22,337 4569350ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 17:54:28,900 4575913ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 18:02:18,413 5045426ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 18:06:09,502 5276515ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 18:23:30,984 6317997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:23:38,530 6325543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:23:46,021 6333034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:38:07,011 7194024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:38:15,574 7202587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:38:24,124 7211137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:39:17,971 7264984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:39:26,723 7273736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:39:34,630 7281643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:39:59,209 7306222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:40:07,444 7314457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 18:40:16,070 7323083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:00:39,049 8546062ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:02:54,296 8681309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:03:02,578 8689591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:03:12,361 8699374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:03:47,754 8734767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:03:58,211 8745224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:04:06,852 8753865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:08:33,405 9020418ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:34:34,401 10581414ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:34:55,088 10602101ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 19:36:16,384 10683397ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:07:42,943 16169956ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:07:48,146 16175159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:07:53,058 16180071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:11,385 17158398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:16,683 17163696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:21,793 17168806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:39,653 17186666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:44,622 17191635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:24:49,686 17196699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 21:45:20,116 18427129ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:22:24,532 20651545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:22:32,221 20659234ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:22:40,112 20667125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:29:22,793 21069806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:29:30,996 21078009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 22:29:36,122 21083135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-13 23:18:32,726 24019739ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 23:19:27,541 24074554ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 23:21:16,129 24183142ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-13 23:53:49,107 26136120ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 00:00:22,534 26529547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 00:00:29,461 26536474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 00:00:36,772 26543785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 08:19:37,944 56484957ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-14 10:19:46,203 63693216ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-14 10:59:21,398 66068411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 10:59:25,992 66073005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 10:59:31,117 66078130ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 11:04:36,819 66383832ms Service                ricingTicketRefund - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefundCheck(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.PricingTicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-06-14 11:16:43,289 67110302ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-14 11:24:17,594 67564607ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-14 11:51:20,973 69187986ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-14 13:24:18,008 74765021ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-14 13:49:32,993 76280006ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-14 15:07:37,919 80964932ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-14 15:27:54,604 82181617ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-14 17:46:20,821 90487834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 17:46:25,853 90492866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 17:46:31,447 90498460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 19:19:02,038 96049051ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:35:05,511 100612524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:35:14,074 100621087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:35:22,106 100629119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:36:37,302 100704315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:36:45,912 100712925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:36:54,163 100721176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:40:08,607 100915620ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:40:17,342 100924355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 20:40:25,748 100932761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:41:05,374 155214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:41:10,781 160621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:41:15,705 165545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:42:56,029 265869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:43:01,233 271072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:43:06,217 276057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:44:50,400 380240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:44:55,759 385598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:45:00,899 390739ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:58:26,006 1195846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:58:31,288 1201127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 21:58:36,335 1206175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:12:15,647 2025487ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:13:25,137 2094977ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:19:35,093 2464932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:19:40,048 2469887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:19:45,359 2475199ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:22:35,735 2645574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:22:46,204 2656044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:22:54,813 2664652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:23:26,364 2696203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:23:35,084 2704923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:23:43,755 2713595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:25:19,905 2809744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:25:24,952 2814791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 22:25:29,858 2819698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 23:03:27,241 5097081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 23:03:32,226 5102066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-14 23:03:37,196 5107035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:00:05,094 8494934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:00:09,891 8499730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:00:14,891 8504731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:05:22,688 8812528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:05:27,607 8817447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:05:32,170 8822010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:08:12,194 8982033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:08:16,927 8986767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:08:21,711 8991551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:10:25,782 9115622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:10:30,595 9120435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:10:35,534 9125374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:13:20,876 9290716ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:13:26,755 9296594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 00:13:32,644 9302484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:08:05,627 12575466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:08:10,704 12580544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:08:15,689 12585529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:17:39,006 13148846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:17:44,084 13153924ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 01:17:48,679 13158518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 06:16:38,860 31088699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 06:16:43,813 31093653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 06:16:48,829 31098668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:04:26,127 33955967ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:04:34,456 33964296ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:04:42,832 33972672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:05:26,414 34016254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:05:34,931 34024770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 07:05:43,197 34033036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 08:38:47,499 39617338ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 09:03:22,704 41092544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 09:03:27,575 41097415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 09:03:32,482 41102322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 12:09:36,222 52266062ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-15 12:10:00,682 52290522ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-15 13:41:25,586 57775426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 13:41:33,993 57783833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 13:41:42,712 57792552ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 13:53:21,671 58491511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 13:53:26,812 58496652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 13:53:32,125 58501964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 14:58:39,720 62409559ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 14:58:44,812 62414651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 14:58:49,766 62419605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:17:37,463 63547303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:17:45,918 63555757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:17:55,137 63564977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:21:24,995 63774835ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:21:33,403 63783243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 15:21:42,497 63792337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:01:57,655 66207495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:02:02,671 66212511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:02:07,703 66217543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:03:22,496 66292335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:03:30,277 66300116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 16:03:38,106 66307945ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:54:49,383 80179222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:54:54,258 80184098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:54:59,087 80188926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:58:01,588 80371427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:58:06,666 80376506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 19:58:11,323 80381162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:05:41,956 80831796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:05:46,687 80836527ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:05:51,704 80841543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:22:08,674 81818513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:22:13,768 81823607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 20:22:18,941 81828780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:12:59,709 84869548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:13:04,506 84874346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:13:09,538 84879378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:16:54,058 85103897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:16:58,887 85108726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-15 21:17:03,653 85113492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:40:24,790 65490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:40:29,478 70178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:40:34,290 74991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:41:13,591 114292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:41:18,670 119370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 02:41:23,437 124138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 07:21:57,505 16958205ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:58:39,684 22760384ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:58:44,777 22765477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:58:49,793 22770494ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:59:00,622 22781323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:59:05,529 22786230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 08:59:10,577 22791277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 10:18:25,353 27546053ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 10:40:41,349 28882050ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:21:49,175 31349875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:21:54,144 31354844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:21:59,003 31359704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:22:57,806 31418506ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:41:04,451 32505151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:41:13,171 32513871ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 11:41:22,217 32522917ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:03:49,346 37470047ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:03:54,566 37475266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:03:59,507 37480208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:14:51,628 38132328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:15:00,303 38141003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:15:06,239 38146939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:16:18,681 38219382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:52:35,064 40395765ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:52:39,987 40400687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 13:52:45,081 40405781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 14:40:16,547 43257248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 14:40:21,642 43262342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 14:40:26,424 43267124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 14:49:34,398 43815098ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 14:52:02,789 43963489ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:03:58,716 44679416ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:07:54,866 44915566ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:08:04,915 44925615ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:08:19,509 44940209ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:08:49,652 44970352ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 15:38:23,826 46744526ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 16:12:51,229 48811930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 16:12:56,199 48816899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 16:13:01,229 48821929ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 17:03:44,169 51864870ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 17:35:18,712 53759412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 17:35:23,500 53764200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 17:35:28,312 53769012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 18:36:59,615 57460315ms Service                ricingTicketRefund - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefundCheck(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.PricingTicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-06-16 18:42:04,443 57765143ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 18:43:06,824 57827524ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 21:30:13,276 67853976ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:30:49,997 67890698ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:31:32,772 67933472ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:32:12,166 67972867ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:32:36,465 67997165ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:38:40,808 68361508ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-16 21:39:38,141 68418842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 21:39:43,251 68423951ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 21:39:48,345 68429045ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 22:28:45,455 71366155ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 22:58:03,287 73123987ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-16 23:28:02,640 74923340ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-16 23:42:13,575 75774275ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 00:16:04,971 77805672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 00:16:10,642 77811342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 00:16:15,456 77816157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 07:52:33,588 828820ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 08:10:25,809 1901041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:10:30,919 1906151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:10:35,951 1911183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:17:27,059 2322291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:17:32,042 2327274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:17:36,745 2331978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:19:18,646 2433878ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:22:39,634 2634866ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:23:13,682 2668915ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 08:30:26,429 3101661ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:10:56,723 5531956ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:11:01,864 5537097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:11:06,990 5542222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:11:19,758 5554990ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:11:25,056 5560288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:11:30,431 5565663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:50:26,472 7901705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:52:59,158 8054391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:53:04,267 8059500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 09:53:09,768 8065001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 10:27:39,292 10134524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 11:23:56,187 13511419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 11:39:34,786 14450018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 11:39:37,552 14452784ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 11:42:58,453 14653686ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 12:12:27,782 16423014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 12:12:32,876 16428109ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 12:12:37,890 16433123ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 12:59:41,009 19256242ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 13:08:33,307 19788540ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 13:35:39,973 21415206ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 13:50:18,284 22293516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:18:59,882 24015114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:19:05,078 24020310ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:19:10,219 24025451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:19:28,767 24043999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:19:33,925 24049158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:19:38,880 24054113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:52:59,104 26054337ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 14:54:25,806 26141038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:54:30,853 26146086ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:54:35,947 26151180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 14:55:52,735 26227968ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:14:02,283 27317516ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:19:21,752 27636984ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:27:05,471 28100703ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:27:52,381 28147613ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:28:09,164 28164396ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 15:55:25,183 29800415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 15:55:30,934 29806167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 15:55:35,762 29810995ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:29:13,670 31828903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:29:18,721 31833953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:29:23,565 31838798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:51:12,276 33147508ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:51:20,199 33155431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 16:51:27,856 33163089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:05:32,417 34007649ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:32:48,465 35643698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:32:54,153 35649386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:33:02,107 35657340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:42:18,905 36214138ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:59:51,328 37266560ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 17:59:59,610 37274842ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 18:05:52,689 37627921ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 18:07:17,429 37712661ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 18:07:27,054 37722287ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 18:21:57,065 38592298ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-17 18:26:53,099 38888331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 18:27:00,693 38895926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 18:27:08,350 38903582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 19:08:11,530 41366763ms Service                MoveNext           - Running time: 104-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-06-17 19:56:13,003 44248235ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 19:56:19,253 44254485ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 20:14:52,045 45367278ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 21:05:07,817 48383050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 21:07:01,061 48496293ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:16:16,656 52651889ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:16:25,344 52660577ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:16:33,861 52669094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:28:49,578 53404811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:28:54,625 53409858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:28:59,751 53414983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-17 22:48:55,809 54611041ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:04:43,142 59158374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:04:48,236 59163468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:04:53,222 59168454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:08:29,573 59384806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:08:34,527 59389760ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:08:39,278 59394510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:11:52,729 59587961ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:12:36,388 59631621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:13:03,078 59658311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:13:46,458 59701690ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:28:32,282 60587515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:28:37,566 60592798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 00:28:42,784 60598016ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 02:06:52,177 66487410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 02:06:57,224 66492457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 02:07:02,195 66497428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 05:47:24,167 79719399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 05:47:31,792 79727025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 05:47:39,153 79734385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 07:52:51,876 87247108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 07:52:56,892 87252124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 07:53:01,658 87256891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 08:42:33,159 90228392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 08:42:38,206 90233439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 08:42:43,050 90238283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:03:47,896 91503128ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:07:48,870 91744102ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:09:46,746 91861979ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:29:39,218 93054450ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:29:57,485 93072717ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:33:12,893 93268125ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:33:27,193 93282425ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:35:36,885 93412117ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:35:36,962 93412195ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:37:48,105 93543337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:37:52,808 93548041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 09:37:57,903 93553135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 10:18:21,247 95976479ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:06:07,220 98842453ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 11:25:13,011 99988244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:25:18,636 99993868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:25:24,339 99999572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:25:40,685 100015917ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:25:45,795 100021027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:25:50,732 100025965ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 11:27:34,744 100129976ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 12:02:03,853 102199085ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 12:15:57,746 103032978ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 12:27:44,282 103739515ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-18 12:57:08,339 1097509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:09:51,750 1860920ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 13:10:36,398 1905568ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 13:12:32,224 2021394ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 13:13:47,105 2096275ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 13:16:54,269 2283439ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 13:29:42,696 3051865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:29:48,120 3057289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:29:53,401 3062571ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:54:49,769 4558939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:54:57,223 4566393ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:55:04,999 4574168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:56:39,911 4669081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:56:47,614 4676784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:56:54,897 4684067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 13:58:12,730 4761900ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 14:03:23,700 5072869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:03:28,560 5077729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:03:33,716 5082886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:48:15,767 7764937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:48:20,627 7769797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:48:25,669 7774838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:49:21,283 7830453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:49:29,254 7838424ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 14:49:36,469 7845639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:02:16,502 8605672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:02:21,459 8610629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:02:26,447 8615617ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:23:23,990 9873160ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:27:55,695 10144865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:28:00,492 10149662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:28:05,461 10154631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:28:18,872 10168042ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:28:23,886 10173056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:28:28,887 10178056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:31:11,305 10340475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:31:16,087 10345257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:31:20,791 10349960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:32:15,428 10404598ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 15:43:36,199 11085369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:43:41,230 11090400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:43:46,262 11095432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 15:57:26,811 11915980ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 15:58:12,018 11961187ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 16:00:18,185 12087355ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 16:03:11,713 12260883ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 16:03:22,777 12271947ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 16:03:37,888 12287057ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:03:41,413 15890583ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:07:12,994 16102164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:07:21,049 16110219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:07:29,112 16118282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:13:24,466 16473636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:13:32,435 16481605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:13:40,998 16490168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:14:45,020 16554189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:14:53,458 16562628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:15:02,023 16571193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:15:16,227 16585397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:15:24,944 16594114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:15:33,554 16602724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:17:26,627 16715797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:17:35,128 16724298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:17:43,488 16732658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:18:51,635 16800804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:18:59,948 16809118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:19:08,339 16817509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:19:37,482 16846652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:19:46,061 16855231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:19:54,859 16864029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 17:28:33,676 17382846ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:29:15,993 17425163ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:37:12,393 17901563ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:47:03,150 18492320ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:49:30,102 18639272ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 17:49:50,558 18659728ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 18:01:21,994 19351164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 18:01:26,901 19356071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 18:01:32,026 19361196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 18:06:05,740 19634910ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-18 19:34:29,328 24938498ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 21:29:56,831 31866001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 21:30:01,972 31871142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 21:30:07,113 31876283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-18 23:19:43,488 38452658ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:13:03,377 41652547ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:13:51,288 41700458ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:14:57,075 41766245ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-19 00:16:57,657 41886827ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:16:58,737 41887907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:17:01,819 41890989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:17:04,893 41894063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:17:16,206 41905376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:17:19,284 41908454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:17:44,694 41933864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:19:18,420 42027590ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 00:31:36,791 42765961ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 05:57:26,415 62315585ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 05:57:55,887 62345057ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 05:59:03,503 62412673ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:41:35,928 64965098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:41:43,521 64972691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:42:04,585 64993755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:56:56,483 65885653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:57:01,343 65890513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 06:57:08,734 65897904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:08:27,161 66576331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:08:31,959 66581129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:08:36,654 66585824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:15:31,469 67000639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:15:36,313 67005483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:15:41,438 67010608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:56:47,707 69476877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:56:57,176 69486346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 07:57:05,113 69494283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 09:33:13,170 75262340ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 09:39:57,971 75667141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 09:40:02,816 75671986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 09:40:07,879 75677049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 09:58:11,689 76760859ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 10:11:54,806 77583976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 10:12:13,698 77602868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 10:12:26,949 77616119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 10:21:55,784 78184954ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 10:24:46,465 78355635ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:13:29,343 81278513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:13:34,396 81283566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:13:39,421 81288591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:16:46,766 81475936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:16:55,517 81484687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:17:03,683 81492853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:36:47,622 82676792ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-19 11:37:40,815 82729985ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:42:06,704 82995873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:42:11,829 83000999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:42:16,765 83005935ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 11:42:31,578 83020748ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-19 12:12:11,159 84800329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:12:15,925 84805095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:12:20,925 84810095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:14:50,678 84959848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:14:56,319 84965489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:15:01,460 84970630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:15:56,151 85025321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:16:01,276 85030446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:16:06,121 85035291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:18:25,290 85174460ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:18:41,949 85191118ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:18:46,092 85195262ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:48:15,752 86964922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:48:20,845 86970015ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 12:48:26,425 86975594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:25:43,296 89212466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:25:48,155 89217325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:25:53,125 89222295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:26:29,003 89258173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:26:33,955 89263125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:26:38,814 89267984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:42:56,741 90245910ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 13:43:01,849 90251019ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 14:06:52,267 91681437ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-19 14:22:43,401 92632571ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 15:12:50,757 95639927ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 15:36:06,564 97035734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 15:36:11,830 97041000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 15:36:16,886 97046056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 16:17:08,775 99497945ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 16:17:47,447 99536617ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 16:18:00,934 99550104ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 17:20:43,675 103312845ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:47:16,972 4094380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:47:21,926 4099334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:47:26,739 4104147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:53:06,640 4444048ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:53:14,971 4452378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:53:23,579 4460987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 18:59:55,162 4852570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:00:00,085 4857492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:00:04,790 4862198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:29:24,207 6621615ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:29:31,661 6629068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:29:39,991 6637398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:32:37,211 6814619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:32:42,040 6819448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:32:47,087 6824495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:39:13,884 7211292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:39:21,636 7219043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:39:29,184 7226591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 19:41:09,972 7327380ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 20:06:18,805 8836213ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:20:49,626 13307034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:20:57,001 13314409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:21:04,674 13322082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:53:58,188 15295595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:54:03,925 15301333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:54:08,973 15306381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:58:55,297 15592704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:59:00,313 15597720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 21:59:04,970 15602377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 22:41:21,197 18138605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 22:41:26,150 18143558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 22:41:31,418 18148826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-19 22:45:08,854 18366261ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-19 22:54:09,247 18906655ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-19 22:54:31,875 18929283ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 06:38:42,991 46780399ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 07:15:22,105 48979512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 07:15:26,871 48984278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 07:15:31,668 48989075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 07:20:46,696 49304103ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 07:20:55,946 49313353ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:08:01,310 55738718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:08:06,356 55743764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:08:11,700 55749108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:22:39,225 56616632ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:55:51,959 58609366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:55:59,178 58616585ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:56:06,788 58624196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:56:56,572 58673980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:57:04,089 58681497ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:57:11,699 58689106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:57:52,870 58730277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:58:01,246 58738653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 09:58:08,887 58746295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 10:00:13,284 58870692ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 10:06:41,476 59258883ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 10:06:48,349 59265757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 10:06:59,898 59277306ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 10:45:03,482 61560890ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:26:24,594 64042001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:26:29,578 64046986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:26:34,704 64052112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:36:41,677 64659084ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:36:49,036 64666444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:36:56,333 64673740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:46:27,477 65244884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:46:35,243 65252650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 11:46:42,914 65260322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 13:28:37,715 71375123ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 13:32:16,060 71593468ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 13:45:41,911 72399319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 13:45:46,833 72404241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 13:45:51,960 72409368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:41:32,024 75749431ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:46:52,372 76069779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:47:00,760 76078167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:47:09,542 76086949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:49:30,259 76227666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:49:35,103 76232511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 14:49:39,806 76237214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:24:34,678 78332086ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:24:39,757 78337165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:24:44,554 78341962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:25:28,449 78385857ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:25:33,606 78391013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:25:38,579 78395987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 15:31:48,198 78765606ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:26:19,010 82036418ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:30:17,362 82274770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:30:22,222 82279629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:30:27,753 82285161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:53:54,556 83691964ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:54:32,246 83729654ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:55:05,156 83762564ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:55:58,927 83816334ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 16:56:11,193 83828601ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-20 17:28:34,344 85771752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 17:28:38,751 85776159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 17:28:43,142 85780550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 18:42:09,573 90186981ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 19:30:35,742 93093150ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 20:19:33,126 96030534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 20:19:39,611 96037019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 20:19:45,111 96042519ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:14:59,000 99356407ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:20:47,994 99705402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:20:52,618 99710026ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:20:57,181 99714589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:27:23,353 100100761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:27:27,760 100105167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 21:27:32,135 100109543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-20 22:16:26,200 103043608ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-21 07:14:03,359 30891696ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 09:09:16,472 37804808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 09:09:20,785 37809121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 09:09:25,176 37813513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 09:35:20,194 1504685ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 09:43:37,015 2001506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 10:07:59,274 3463765ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 10:57:46,781 6451272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 10:57:53,719 6458210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 10:58:00,095 6464586ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 11:02:00,656 6705146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 11:02:07,431 6711922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 11:02:13,932 6718423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 12:39:19,337 12543828ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-21 12:39:21,822 12546313ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-21 12:39:24,306 12548797ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-21 12:56:03,538 13548029ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 13:46:59,583 16604074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 13:47:04,162 16608653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 13:47:08,725 16613216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:10:43,802 18028293ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:10:48,412 18032903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:10:53,049 18037540ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:11:39,974 18084464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:11:44,365 18088856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:11:48,771 18093262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:13:18,302 18182793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:13:22,662 18187153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:13:27,084 18191575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:14:07,245 18231736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:14:11,917 18236408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:14:16,543 18241034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 14:14:21,590 18246081ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-21 15:57:42,310 24446801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 15:57:46,763 24451254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 15:57:51,545 24456036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:00:47,775 24632265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:00:52,415 24636906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:00:57,135 24641626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:16:29,821 25574312ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:16:34,650 25579141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 16:16:39,009 25583500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:09:23,782 28748272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:09:28,313 28752804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:09:32,923 28757414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:15:40,519 29125009ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:18:15,220 29279711ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:18:18,658 29283149ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:55:22,519 31507010ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:56:16,467 31560958ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 17:57:14,199 31618690ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 18:01:59,161 31903651ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 18:02:02,239 31906730ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 19:41:39,378 37883869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 19:41:44,003 37888494ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 19:41:48,614 37893104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 20:11:34,369 39678860ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-21 21:34:34,008 44658499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 21:34:38,430 44662921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 21:34:42,931 44667421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 21:56:59,279 46003769ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 22:25:21,920 47706411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 22:25:26,513 47711003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-21 22:25:30,934 47715425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 06:42:02,515 10937636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 06:42:06,938 10942059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 06:42:11,250 10946371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:10:08,872 12623993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:10:16,357 12631478ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:10:22,843 12637964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:11:15,722 12690843ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:11:20,034 12695155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 07:11:24,379 12699500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 09:22:32,504 20567625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 09:22:36,801 20571922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 09:22:41,146 20576267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 10:32:39,245 24774366ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 10:38:54,235 25149356ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 10:57:04,804 26239925ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 11:13:13,516 27208637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:13:18,000 27213121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:13:22,329 27217450ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:15:13,373 27328494ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:15:17,733 27332854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:15:22,061 27337182ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:17:06,071 27441192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:17:10,446 27445567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:17:14,790 27449911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 11:23:41,091 27836212ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 11:38:01,024 28696145ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 12:10:46,402 30661523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:10:50,996 30666117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:10:55,622 30670743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:16:15,827 30990948ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:16:20,287 30995408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:16:24,672 30999793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:31:00,664 31875785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:31:08,024 31883145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 12:31:15,197 31890318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 13:04:25,978 33881099ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 15:43:20,821 43415942ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:40:52,650 46867771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:40:59,463 46874584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:41:06,089 46881210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:42:35,349 46970470ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:42:41,896 46977017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:42:48,397 46983518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:44:48,598 47103719ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:44:55,262 47110383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 16:45:01,945 47117066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 18:14:41,516 52496637ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 18:14:43,438 52498559ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 19:23:21,117 56616238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 19:23:27,692 56622813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 19:23:34,208 56629329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 19:47:48,735 58083856ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 19:48:46,913 58142034ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-22 20:11:39,378 59514499ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-22 20:11:55,051 59530172ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-22 20:14:25,299 59680420ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-22 20:14:30,940 59686061ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-22 20:19:47,636 60002757ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:02:06,537 62541658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:02:13,006 62548127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:02:19,586 62554707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:46:30,582 65205703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:46:35,082 65210203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:46:39,583 65214704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:50:13,492 65428613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:50:17,899 65433020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-22 21:50:22,305 65437426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:06:06,278 102381399ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:10:07,753 102622874ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 08:12:44,975 102780096ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:12:51,413 102786534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:12:57,931 102793052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:37:22,940 104258061ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:37:34,660 104269781ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 08:51:14,777 105089898ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 09:49:07,580 2743434ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 10:37:58,476 5674330ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 10:52:41,395 6557248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 10:52:45,739 6561593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 10:52:50,099 6565952ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:33:32,052 12607905ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:40:32,270 13028124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:40:36,833 13032687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:40:41,865 13037719ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:46:33,565 13389419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:46:37,972 13393826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:46:42,878 13398732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:59:50,394 14186248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:59:55,020 14190874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 12:59:59,629 14195483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 13:01:09,478 14265332ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 13:01:13,869 14269723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 13:01:18,291 14274145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 13:43:50,040 16825894ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 13:44:39,513 16875366ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 13:53:49,317 17425170ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:08:52,025 18327879ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:08:59,698 18335552ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:09:04,776 18340630ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:09:14,293 18350147ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:09:29,450 18365304ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:09:58,984 18394838ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 14:10:45,192 18441046ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:11:27,148 18483002ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:11:59,697 18515551ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:13:04,080 18579934ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:39:31,251 20167105ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 14:40:11,692 20207546ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:55:17,764 21113618ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:55:20,207 21116061ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:55:22,562 21118416ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:56:57,539 21213393ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 14:57:09,003 21224857ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 15:21:35,165 22691019ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:26:47,295 23003149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:26:51,749 23007603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:26:56,124 23011978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:52:31,001 24546855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:52:37,658 24553511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:52:44,222 24560076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:53:11,772 24587626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:53:18,412 24594266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 15:53:25,412 24601266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 16:27:35,582 26651436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 16:27:39,972 26655826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 16:27:44,363 26660217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:14:49,611 29485465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:14:56,032 29491886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:15:02,658 29498512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:17:52,717 29668571ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:17:59,311 29675165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:23:04,208 29980062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:23:10,756 29986610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 17:23:17,256 29993110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 18:38:27,175 34503029ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 19:09:28,684 36364538ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 19:10:58,875 36454729ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 19:21:03,184 37059038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 19:21:07,763 37063617ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 19:21:12,263 37068117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 20:03:35,179 39611033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 20:03:39,601 39615455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 20:03:44,039 39619893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 20:07:12,306 39828160ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 20:53:27,580 42603434ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 21:02:40,339 43156193ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-23 21:17:32,088 44047942ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-23 21:32:00,781 44916635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 21:32:05,203 44921057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 21:32:09,625 44925479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 22:04:41,730 46877584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 22:04:46,199 46882053ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-23 22:04:50,576 46886430ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:45:31,604 70927458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:45:38,088 70933942ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:45:44,560 70940414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:48:39,496 71115350ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:49:03,118 71138972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 04:49:14,292 71150145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:01:38,852 82694706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:01:43,211 82699065ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:01:47,578 82703432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:09:38,043 83173897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:09:44,716 83180570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:09:51,310 83187164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:10:36,955 83232809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:10:43,315 83239169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:10:49,972 83245826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:11:12,753 83268607ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:31:21,524 84477378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:31:25,883 84481737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:31:30,210 84486064ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 08:35:07,772 84703626ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:31:06,369 88062223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:31:10,807 88066661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:31:15,199 88071053ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:32:33,743 88149596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:32:38,170 88154024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:32:42,546 88158400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:41:25,750 88681604ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:41:36,907 88692761ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:41:57,876 88713730ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:42:32,501 88748355ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 09:42:53,034 88768888ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:01:40,728 89896582ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:08:02,092 90277946ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:08:34,984 90310838ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:09:15,581 90351435ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:10:35,796 90431650ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:43:47,023 92422877ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:50:00,466 92796320ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 10:58:29,103 93304957ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:01:34,343 93490197ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:09:11,950 93947803ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:31:16,210 95272064ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:31:22,615 95278469ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:31:29,194 95285048ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:31:52,743 95308597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:31:59,259 95315113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 11:32:05,854 95321708ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 13:24:36,057 102071911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 13:24:40,557 102076411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 13:24:44,933 102080786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:40:42,204 2231047ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:40:48,923 2237766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:40:55,705 2244548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:42:43,627 2352470ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:42:50,252 2359095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:42:56,878 2365721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:45:39,494 2528337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:45:43,948 2532791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:45:48,323 2537166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:46:30,311 2579154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:46:34,655 2583498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:46:38,984 2587827ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:46:56,751 2605594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:47:01,142 2609985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 14:47:05,519 2614362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:21:36,787 4685631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:21:41,194 4690037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:21:45,601 4694444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:34:32,825 5461668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:34:37,233 5466076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:34:41,655 5470499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:52:11,580 6520423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:52:15,966 6524809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 15:52:20,466 6529309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:05:47,297 7336140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:05:51,937 7340781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:05:56,562 7345405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:45:56,163 9745006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:46:00,726 9749569ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 16:46:05,211 9754054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 17:39:44,201 12973044ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-24 18:26:44,582 15793425ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 18:54:59,986 17488829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 18:55:04,642 17493486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 18:55:09,033 17497876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 19:44:30,675 20459518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 19:44:35,191 20464034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 19:44:39,660 20468503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:00:54,628 21443471ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:01:39,274 21488117ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:02:26,793 21535636ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:12:25,891 22134734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:12:32,641 22141484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:12:39,142 22147985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:13:56,883 22225726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:14:01,289 22230132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 20:14:05,726 22234570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:18:44,443 26113286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:18:51,046 26119889ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:18:57,624 26126467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:19:59,645 26188488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:20:06,333 26195177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:20:12,975 26201818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:24:23,254 26452097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:24:30,614 26459458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 21:24:37,865 26466708ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:36:27,264 30776107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:36:33,686 30782529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:36:40,265 30789108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:54:19,648 31848491ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:54:24,039 31852882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-24 22:54:28,461 31857304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:36:48,018 45196862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:36:52,425 45201268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:36:56,880 45205723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:37:31,960 45240803ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:37:36,476 45245319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 02:37:40,804 45249647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:10:51,176 47240019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:10:55,608 47244452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:10:59,937 47248780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:17:55,662 47664505ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:18:00,178 47669021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:18:04,568 47673412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:09,710 47858553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:14,132 47862976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:18,508 47867351ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:46,042 47894885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:50,417 47899260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:21:54,761 47903604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:23:01,611 47970454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:23:06,065 47974908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:23:10,518 47979361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:25:46,125 48134968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:25:50,563 48139407ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 03:25:54,941 48143785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 07:15:49,952 61938795ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 07:45:09,656 63698500ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 09:17:40,031 3689833ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 09:17:58,392 3708194ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 09:35:37,009 4766810ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 09:37:22,924 4872726ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:00:13,808 6243610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:00:20,328 6250129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:00:26,891 6256692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:02:06,056 6355858ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:42:09,967 8759769ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:42:17,186 8766988ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:45:17,172 8946973ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 10:58:55,260 9765062ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 11:26:50,395 11440197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 11:26:57,208 11447010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 11:27:03,709 11453510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:06:03,075 13792877ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:09:00,700 13970502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:09:05,248 13975049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:09:09,826 13979627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:18:09,983 14519785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:18:14,390 14524192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 12:18:18,735 14528536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 13:03:12,241 17222043ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 14:37:52,429 22902231ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:01:13,210 24303012ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:17:44,970 25294771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:17:51,470 25301272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:17:58,111 25307913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:23:20,124 25629926ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:54:27,576 27497377ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 15:56:03,709 27593511ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 16:32:15,873 29765674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 16:32:20,311 29770112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 16:32:24,702 29774503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 19:41:32,845 2271595ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 20:20:06,521 4585270ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-25 20:58:45,760 6904510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 20:58:50,166 6908916ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 20:58:54,525 6913274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:02:54,018 7152767ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:10:54,966 7633715ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:38:44,709 9303459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:38:51,382 9310131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:38:58,320 9317069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:41:00,518 9439267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:41:07,144 9445893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:41:13,754 9452503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:43:06,999 9565748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:43:13,702 9572451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:43:20,296 9579046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:45:17,619 9696369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:45:24,370 9703119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 21:45:31,027 9709776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:03:26,830 14385580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:03:31,222 14389971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:03:35,628 14394378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:04:16,570 14435319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:04:20,993 14439742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:04:25,332 14444082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:07:10,460 14609209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:07:15,023 14613772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:07:19,430 14618179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:07:51,308 14650057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:07:55,699 14654448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:08:00,089 14658839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:09:04,861 14723610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:09:09,267 14728017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:09:13,674 14732423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:10:43,606 14822355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:10:47,962 14826711ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:10:52,435 14831185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-25 23:27:48,385 15847134ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:55:32,153 21110903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:55:36,513 21115263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:55:40,888 21119638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:56:37,771 21176521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:56:42,161 21180910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 00:56:46,520 21185270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 01:00:07,165 21385915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 01:00:12,807 21391557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 01:00:17,320 21396069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 06:56:37,174 42775923ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 06:56:42,887 42781636ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 08:38:29,017 48887766ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 08:41:22,598 49061347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 08:41:29,223 49067973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 08:41:36,020 49074770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:10:59,267 50838017ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:26:31,819 51770568ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:26:52,852 51791601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:26:57,180 51795930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:27:01,509 51800258ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:36:44,971 52383720ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:37:58,585 52457335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:38:03,289 52462039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 09:38:07,929 52466679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:03:07,114 53965864ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:03:19,084 53977833ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:04:03,400 54022150ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:23:39,848 55198597ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:24:05,115 55223864ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:24:21,461 55240210ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 10:26:34,468 55373217ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:01:52,015 57490764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:01:56,531 57495280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:02:01,016 57499765ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:02:09,985 57508735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:02:14,454 57513204ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:02:19,017 57517767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:24:30,619 58849369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:24:35,042 58853791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:24:39,464 58858214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:54:22,167 60640916ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:54:26,774 60645524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 11:54:31,275 60650025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:02:42,302 61141052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:02:46,802 61145552ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:02:51,147 61149896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:33:30,014 62988764ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:33:51,376 63010125ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:33:55,001 63013751ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:33:59,330 63018079ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:05,862 63024611ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:17,159 63035909ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:27,643 63046393ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:37,144 63055894ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:42,535 63061284ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:34:53,927 63072676ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 12:37:49,788 63248537ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:04,944 66923694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:09,428 66928178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:13,790 66932539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:30,479 66949228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:34,807 66953557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 13:39:39,136 66957886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:08:51,309 68710059ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:17:58,883 69257633ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:19:00,465 69319215ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:19:06,982 69325731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:19:13,468 69332217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:23:04,446 69563196ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:23:28,248 69586997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:23:34,858 69593607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:23:41,264 69600013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:45:34,700 70913449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:45:41,264 70920013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 14:45:47,779 70926529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:01:40,866 71879615ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:02:44,494 71943243ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:15:25,743 72704492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:15:30,118 72708867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:15:34,477 72713227ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:32:20,065 73718814ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:32:24,501 73723250ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 15:32:28,882 73727631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 16:01:58,654 75497403ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:02:34,642 75533391ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:02:39,033 75537783ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:03:45,538 75604288ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:03:49,648 75608397ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:03:53,758 75612507ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:03:56,338 75615087ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:04:05,353 75624102ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:04:09,869 75628618ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:04:14,463 75633213ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:04:17,135 75635884ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:05:07,205 75685955ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:05:12,783 75691533ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:05:17,909 75696658ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:05:21,143 75699893ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:20:11,353 76590103ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:20:23,431 76602181ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:20:51,293 76630043ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:20:54,246 76632995ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:21:00,715 76639465ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:21:08,576 76647325ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:21:26,218 76664968ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:21:29,078 76667827ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:21:35,438 76674187ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:27:52,310 77051059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 16:27:56,717 77055466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 16:28:01,420 77060170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 16:48:54,624 78313373ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:49:19,115 78337864ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:49:21,568 78340317ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 16:49:27,881 78346630ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 17:01:53,962 79092712ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 17:02:15,464 79114214ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 17:35:46,641 81125391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 17:35:51,094 81129844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 17:35:55,423 81134172ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 18:08:01,533 83060282ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 18:08:11,799 83070548ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 19:07:06,312 86605061ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 19:30:09,583 87988333ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 19:44:42,624 88861373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 19:44:47,333 88866083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 19:44:51,943 88870693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 20:47:39,990 92638739ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-26 20:49:34,235 92752984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 20:49:38,705 92757454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 20:49:43,032 92761782ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 20:50:25,784 92804534ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 21:34:48,878 95467627ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 21:37:39,983 95638733ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 23:08:50,888 101109638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 23:08:55,574 101114323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 23:09:00,200 101118950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-26 23:34:06,656 102625406ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:34:23,798 102642547ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:34:26,360 102645109ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:34:32,626 102651376ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:34:43,080 102661830ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:34:45,616 102664365ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:35:50,805 102729554ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:36:50,576 102789326ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:36:53,062 102791811ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:36:59,406 102798155ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:37:17,094 102815844ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:37:19,657 102818406ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-26 23:37:24,438 102823188ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 06:12:12,154 22099516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:30:28,821 26796183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:30:33,212 26800574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:30:37,619 26804980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:38:59,744 27307105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:39:04,121 27311482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:39:08,416 27315778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:54:37,885 28245246ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 07:55:24,140 28291501ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 07:55:26,609 28293970ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 07:55:35,841 28303203ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 07:55:57,983 28325345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:56:02,483 28329844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 07:56:07,217 28334579ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:46:15,352 34942714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:46:19,743 34947104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:46:24,087 34951449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:27,365 35494726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:31,803 35499164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:36,192 35503554ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:48,226 35515587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:52,632 35519994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 09:55:56,991 35524353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 10:02:24,911 35912273ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:03:21,493 35968855ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:03:23,963 35971324ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:03:30,072 35977434ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:04:13,357 36020719ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:04:15,983 36023344ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:04:22,141 36029503ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:08:26,550 36273912ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:08:29,051 36276413ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:08:35,085 36282446ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-27 10:54:26,000 39033362ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:30:55,741 41223103ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:10,961 42018323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:15,384 42022745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:19,915 42027277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:36,042 42043403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:40,433 42047794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 11:44:44,792 42052154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 13:18:09,670 47657032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 13:18:14,358 47661720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 13:18:18,983 47666345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 14:24:22,492 51629854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 14:24:26,993 51634354ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 14:24:31,352 51638714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 14:35:14,964 52282326ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-27 14:35:20,887 52288248ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-27 15:26:10,245 55337606ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 15:53:42,155 56989517ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 15:53:46,596 56993958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 15:53:51,503 56998865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 16:04:20,885 57628247ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-27 16:57:50,080 60837441ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 17:30:03,895 62771257ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 17:49:29,260 63936621ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 19:52:54,412 71341774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 19:53:01,241 71348603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 19:53:07,913 71355275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:43:18,388 74365750ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:43:25,029 74372391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:43:31,619 74378980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:45:01,067 74468429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:45:05,445 74472806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 20:45:09,830 74477191ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 21:28:14,761 77062123ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 21:28:19,151 77066512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 21:28:23,511 77070872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 22:19:19,201 80126563ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 23:43:36,625 85183986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 23:43:41,031 85188393ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-27 23:43:45,391 85192752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 00:02:48,097 86335458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 00:02:52,488 86339849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 00:02:56,894 86344256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 07:00:31,129 6954743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 07:00:35,567 6959181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 07:00:39,895 6963509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 08:12:38,046 11281660ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 08:13:08,272 11311886ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 08:16:26,749 11510363ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 08:53:34,900 13738515ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 08:58:31,481 14035095ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 09:00:18,149 14141763ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 09:07:09,765 14553379ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 09:15:09,456 15033070ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 09:15:14,722 15038336ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 09:44:17,286 16780900ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 09:52:12,733 17256347ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:12:55,192 18498806ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:14:05,536 18569150ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:14:12,631 18576245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 10:14:17,007 18580621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 10:14:21,429 18585043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 10:27:07,233 19350847ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 10:46:32,760 20516374ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:47:09,763 20553377ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:47:12,392 20556006ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 10:47:18,639 20562253ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 13:19:00,299 29663913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 13:19:04,721 29668335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 13:19:09,909 29673523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 14:24:12,786 33576400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 14:24:19,548 33583162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 14:24:26,008 33589622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 16:58:08,439 42812053ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 16:58:59,491 42863105ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 16:59:11,742 42875356ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 17:07:45,667 43389281ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:07:50,090 43393704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:07:54,470 43398084ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:43:22,125 45525739ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:46:47,110 45730724ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:53:20,876 46124490ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 17:53:54,003 46157617ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-28 18:06:48,454 46932068ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 18:20:26,733 47750347ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:12,237 52715851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:16,909 52720523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:21,488 52725102ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:30,138 52733752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:34,806 52738420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:39,385 52742999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:48,214 52751828ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:52,886 52756500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 19:43:57,511 52761125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:09,071 53972685ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:13,681 53977295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:18,306 53981920ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:27,125 53990739ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:31,765 53995380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:04:36,358 53999972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-28 20:26:24,169 55307783ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 20:26:36,311 55319925ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 20:26:38,780 55322394ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-28 20:36:35,805 55919419ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 00:18:14,791 69218405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 02:17:40,933 76384547ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-29 05:24:16,951 87580565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 05:24:21,373 87584987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 05:24:25,748 87589362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:18:36,322 90839936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:18:40,714 90844328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:18:45,058 90848672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:19,763 90883377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:26,533 90890147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:30,906 90894520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:50,486 90914100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:54,830 90918444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:19:59,190 90922804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:20:33,474 90957088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:20:37,787 90961401ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:20:42,131 90965745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:41:08,411 92192025ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:41:43,177 92226791ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:41:46,804 92230418ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:45:38,154 92461768ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 06:45:59,451 92483065ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 07:06:18,564 93702178ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:21:20,644 101804258ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:21:27,207 101810821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:21:33,723 101817337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:38:57,760 102861374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:39:02,369 102865983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 09:39:06,807 102870421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 10:15:48,115 691459ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 10:16:35,807 739150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 10:16:40,153 743497ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 10:16:44,481 747825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 12:46:37,524 9740867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 12:46:41,867 9745210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 12:46:46,289 9749633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 13:36:13,138 12716482ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:17:27,166 15190509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:17:33,557 15196900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:17:40,103 15203447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:32:23,969 16087313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:32:30,356 16093699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 14:32:36,920 16100264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 15:39:43,775 20127118ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 16:15:10,546 22253889ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 16:15:36,157 22279501ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 16:24:44,335 22827679ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 17:12:50,986 25714330ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 17:14:57,506 25840850ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:26:10,379 30113722ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:26:14,785 30118129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:26:19,161 30122504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:57:51,592 32014936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:57:58,249 32021592ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 18:58:04,812 32028156ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 20:01:13,474 35816818ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 20:06:54,817 36158161ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:20:40,206 44183550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:20:44,691 44188035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:20:49,051 44192395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:21:08,834 44212178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:21:13,163 44216507ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-29 22:21:17,522 44220866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 00:15:52,811 51096155ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 00:20:34,013 51377357ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 07:41:22,215 77825559ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 07:41:26,637 77829981ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 07:41:31,061 77834405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 07:59:19,638 78902982ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 08:14:11,960 79795304ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 08:21:06,396 80209740ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 08:57:30,302 82393646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 08:57:34,740 82398084ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 08:57:39,116 82402459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 09:10:48,725 83192069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 09:10:53,241 83196585ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 09:10:57,835 83201179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 10:42:38,508 88701852ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 10:43:09,042 88732386ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 10:56:28,758 89532101ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 11:35:04,333 91847676ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 12:22:56,633 94719977ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 12:28:45,003 95068347ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 12:47:42,340 96205684ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 12:53:05,415 96528759ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:10,041 96533384ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:25,465 96548809ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:29,288 96552632ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:35,585 96558929ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:39,586 96562929ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:43,633 96566976ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 12:53:46,180 96569524ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 13:00:14,659 96958003ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 13:03:13,286 97136630ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 13:07:28,934 97392278ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 13:20:42,461 98185804ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 13:53:12,197 100135541ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 13:53:52,479 100175823ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-06-30 14:03:26,481 100749824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:03:30,935 100754278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:03:35,350 100758694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:10:51,563 101194907ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:44:37,417 103220761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:44:41,886 103225230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:44:46,325 103229668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:59:28,805 104112149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:59:35,274 104118618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 14:59:41,796 104125140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:17:46,605 803732ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:18:48,911 866038ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:19:41,740 918866ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:23:46,390 1163516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:26:42,668 1339795ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:29:05,703 1482829ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 15:57:36,743 3193870ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 16:01:51,571 3448698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 16:01:56,040 3453167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 16:02:01,995 3459122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 16:39:07,275 5684401ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:00:00,395 6937521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:00:04,864 6941991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:00:09,239 6946365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:54:35,229 10212355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:54:42,635 10219761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 17:54:50,870 10227997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 19:39:04,886 16482012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 19:39:11,499 16488626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 19:39:17,998 16495124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:06:02,966 18100093ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:06:38,768 18135895ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:13:28,688 18545814ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:13:33,266 18550393ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:13:37,657 18554784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:31:07,999 19605125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:31:12,484 19609610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:31:16,953 19614079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 20:53:36,868 20953995ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 21:08:30,815 21847941ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:19:54,866 26131993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:19:59,320 26136446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:20:03,774 26140900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:23:39,031 26356158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:23:43,765 26360892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:23:48,453 26365580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:47:31,059 27788185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:47:35,669 27792795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:47:40,357 27797483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:49:33,539 27910665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:49:38,164 27915291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:49:42,867 27919994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:53:34,765 28151891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:53:39,359 28156485ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 22:53:44,000 28161127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 23:15:26,365 29463492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 23:15:30,928 29468055ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 23:15:35,350 29472477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-06-30 23:22:38,275 29895402ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 03:20:50,206 44187332ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 06:12:06,588 54463715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 06:12:11,166 54468292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 06:12:15,772 54472898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:14:22,222 61799349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:14:26,800 61803927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:14:31,177 61808303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:20:21,016 62158142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:20:25,423 62162550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:20:29,815 62166941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:39:37,730 63314856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:39:42,247 63319373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 08:39:46,642 63323769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 09:00:02,924 64540051ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:01:08,176 68205303ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:11:13,648 68810774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:11:18,288 68815415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:11:22,835 68819962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:11:24,805 68821931ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:11:45,275 68842402ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:12:58,016 68915142ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:27:01,047 69758173ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:30:22,808 69959934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:30:27,323 69964449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 10:30:31,683 69968809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:00:55,582 71792708ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:20:44,766 72981892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:20:51,360 72988486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:20:57,829 72994956ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:36:25,289 73922416ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 11:45:38,198 74475324ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:05:05,529 75642655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:05:10,077 75647203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:05:14,451 75651578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:32:00,403 77257529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:32:05,012 77262139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:32:09,340 77266467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:36:30,705 77527832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:36:35,347 77532473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:36:39,698 77536824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 12:40:18,779 77755906ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 13:21:49,060 80246186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 13:21:53,654 80250780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 13:21:58,061 80255187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 14:20:18,701 83755828ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 14:58:02,114 86019241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 14:58:06,802 86023928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 14:58:11,256 86028382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 15:11:57,268 86854394ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 15:12:21,568 86878694ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 15:15:29,044 87066170ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 15:17:31,482 87188609ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 15:17:41,234 87198360ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:01:06,615 89803741ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:01:11,271 89808398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:01:15,991 89813117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:09:01,381 90278507ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-01 16:16:09,861 90706988ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:16:14,549 90711676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:16:19,471 90716598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:30:32,889 91570015ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:30:37,718 91574844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 16:30:42,296 91579423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:01:30,811 93427937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:01:35,482 93432609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:01:39,905 93437031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:09:03,028 93880155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:21:44,589 94641715ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:34:44,935 95422062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:34:49,373 95426500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:34:53,764 95430890ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 17:54:35,229 96612355ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-01 18:15:00,136 97837262ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 18:46:21,799 99718925ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:12:31,776 101288903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:12:36,370 101293497ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:12:40,856 101297982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:14:39,663 101416789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:14:44,288 101421415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:14:48,804 101425931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:17:34,893 101592019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:17:39,534 101596660ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:17:43,909 101601036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:19:44,764 101721890ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:19:49,467 101726593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 19:19:53,936 101731063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:08:49,278 257866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:08:56,014 264602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:09:03,046 271634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:10:57,665 386253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:11:04,448 393036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 20:11:11,260 399849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:18:28,338 4436926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:18:32,761 4441350ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:18:37,246 4445834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:23:44,505 4753093ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:23:48,909 4757498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:23:53,316 4761904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:30:08,208 5136797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:30:12,912 5141501ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:30:17,335 5145923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:31:41,732 5230321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:31:46,217 5234805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 21:31:50,622 5239211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 23:21:47,829 11836418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 23:21:52,297 11840886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-01 23:21:56,751 11845339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 00:14:55,230 15023818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 00:15:02,213 15030801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 00:15:09,089 15037677ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 06:56:33,560 39122148ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 07:28:05,012 41013600ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:30:58,629 44787217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:31:03,349 44791937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:31:07,848 44796437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:31:32,851 44821439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:31:37,414 44826002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:31:41,961 44830549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 08:49:06,844 45875432ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-02 09:00:20,013 46548601ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-02 09:02:16,148 46664737ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-02 09:04:45,333 46813921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:04:49,895 46818483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:04:54,303 46822891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:06:49,178 46937766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:06:53,865 46942454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:06:58,334 46946922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:38:32,788 48841377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:38:37,383 48845971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:38:41,758 48850346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:39:11,198 48879787ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:39:17,980 48886568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:39:24,543 48893131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 09:57:40,991 49989579ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 10:31:22,787 52011375ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 10:35:47,908 52276496ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 10:35:52,537 52281126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 10:35:57,115 52285704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:04:48,848 54017436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:04:53,379 54021968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:04:57,786 54026374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:13:54,034 54562622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:13:58,801 54567390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:03,302 54571890ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:16,536 54585124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:21,070 54589658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:25,648 54594237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:42,756 54611344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:47,628 54616217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:14:52,317 54620905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:15:45,588 54674177ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:48:54,989 56663577ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:49:02,083 56670672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:49:08,655 56677243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:56:59,188 57147777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:57:03,767 57152355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 11:57:08,158 57156746ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:01:43,941 57432529ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:05:33,243 57661832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:16:10,498 58299086ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:16:13,436 58302024ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:16:22,389 58310978ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:16:33,194 58321783ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:17:10,448 58359037ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:17:26,871 58375460ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:17:44,686 58393275ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:27:26,170 58974758ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:27:43,046 58991635ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:34:21,772 59390360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:34:26,320 59394908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 12:34:30,820 59399409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 13:31:48,534 62837122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 13:31:53,144 62841732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 13:31:59,957 62848546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:22:58,815 65907403ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:40:19,850 66948439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:40:24,414 66953002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:40:28,820 66957408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:50:11,308 67539897ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 14:53:34,789 67743377ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 15:18:16,839 69225428ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-02 16:44:03,857 74372446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 16:44:08,420 74377009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 16:44:12,764 74381353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:06:40,771 79329359ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:08:09,404 79417992ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:30:30,045 80758633ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:44:51,780 81620368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:44:58,483 81627072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:45:05,078 81633666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:56:04,840 82293428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:56:09,482 82298070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:56:14,075 82302664ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 18:58:10,461 82419049ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:04:39,169 86407757ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:14:45,419 87014007ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:18:10,660 87219248ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:18:25,114 87233702ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:30:21,706 87950294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:30:29,113 87957701ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 20:30:37,020 87965608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 21:17:27,140 90775728ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-02 22:07:59,009 93807597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 22:08:04,228 93812816ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-02 22:08:08,837 93817426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:24:18,789 101987377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:24:30,857 101999446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:24:35,260 102003848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:28:10,607 102219195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:28:15,045 102223633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:28:19,406 102227994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:40:18,657 102947246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:40:23,111 102951699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 00:40:27,518 102956106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 02:17:55,257 4368659ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 03:12:55,885 7669287ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 05:26:05,481 15658883ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 05:26:28,515 15681916ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:13:18,714 25692116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:13:25,225 25698627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:13:31,616 25705018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:33:37,416 26910818ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:43:06,430 27479832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:43:12,118 27485520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:43:16,462 27489864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:49:57,511 27890913ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:51:40,490 27993892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:51:47,084 28000486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 08:51:53,507 28006909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 09:06:43,744 28897145ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 09:06:46,587 28899989ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 09:06:48,979 28902381ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 09:07:28,545 28941946ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 09:07:30,935 28944337ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 09:07:33,576 28946978ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 10:04:37,151 32370553ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:07:08,180 32521582ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:07:12,336 32525738ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:07:32,995 32546397ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:37:40,892 34354294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:37:47,830 34361232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:37:54,441 34367842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 10:39:42,824 34476226ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 11:03:39,509 35912911ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:13:20,286 36493688ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 11:25:26,196 37219598ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:25:32,744 37226146ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:25:43,229 37236631ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:26:45,672 37299074ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:27:03,658 37317060ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:27:27,941 37341343ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:33:45,561 37718963ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:35:40,997 37834399ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:37:07,714 37921116ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 11:37:25,580 37938982ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 11:52:26,813 38840215ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 11:53:15,459 38888861ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:53:17,849 38891251ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:53:20,350 38893751ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:57:34,559 39147961ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:57:38,966 39152368ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:57:41,388 39154790ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 11:58:02,483 39175885ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 12:52:57,960 42471362ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 12:57:48,773 42762175ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 12:58:32,104 42805506ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 12:58:57,592 42830993ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:00:35,802 42929204ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:16:16,019 43869421ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:17:35,791 43949193ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:33:41,824 44915226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:33:49,058 44922460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:33:56,384 44929786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:19,642 45793044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:26,220 45799622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:31,205 45804607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:47,175 45820577ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:51,769 45825171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:48:56,379 45829781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:56:29,298 46282700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:56:39,503 46292904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 13:56:46,597 46299998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:01:12,908 46566309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:01:17,424 46570825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:01:21,814 46575216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:30:13,997 48307399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:34:06,012 48539414ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:10,575 49323977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:15,107 49328509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:19,685 49333087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:28,873 49342275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:33,373 49346775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:37,889 49351291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:46,953 49360355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:51,464 49364866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:47:55,936 49369338ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:05,093 49378495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:09,578 49382980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:14,188 49387590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:23,329 49396731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:27,782 49401184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:48:32,423 49405825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:49:02,724 49436125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:49:07,240 49440642ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:49:11,724 49445126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:55:20,853 49814255ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:55:46,113 49839515ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:58:07,416 49980818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:58:14,027 49987429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 14:58:20,654 49994056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 15:41:11,391 52564792ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:05:33,085 54026487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:05:37,695 54031097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:05:42,086 54035487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:09:00,710 54234112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:09:08,148 54241550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:09:14,866 54248268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:34:28,125 55761527ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:34:34,860 55768262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:34:41,970 55775372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:34:54,674 55788076ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 16:35:02,769 55796171ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:14:23,342 58156744ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:34:44,149 59377551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:34:51,884 59385286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:34:58,369 59391770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:03,127 60776529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:07,612 60781014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:12,097 60785498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:20,582 60793984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:26,005 60799406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:58:31,662 60805063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 17:59:54,091 60887493ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 18:01:42,569 60995971ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 18:03:50,002 61123404ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 18:57:51,548 64364950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 18:57:56,064 64369466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 18:58:02,033 64375435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:40:33,116 66926517ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:40:39,851 66933252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:40:46,602 66940004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:43:44,407 67117809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:43:52,111 67125513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:44:00,987 67134389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 19:46:56,846 67310247ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 19:53:36,374 67709775ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 19:53:51,563 67724964ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 20:06:34,413 68487814ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 20:17:38,468 69151870ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 20:20:06,012 69299414ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 20:29:48,651 69882053ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 20:34:37,411 70170813ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-03 20:53:32,406 71305808ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 21:05:14,796 72008198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 21:05:19,359 72012761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 21:05:23,891 72017293ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 22:08:07,751 75781152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 22:08:14,971 75788373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 22:08:22,107 75795509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-03 22:17:55,528 76368930ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-03 22:42:49,877 77863278ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 01:14:50,526 86983928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 01:14:57,180 86990582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 01:15:03,744 86997146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 08:02:22,089 7049940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 08:02:26,746 7054596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 08:02:32,574 7060425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 08:47:00,109 9727960ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 08:47:56,160 9784011ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 09:11:47,183 11215034ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 09:28:54,136 12241987ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:23:59,689 15547540ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:30:29,059 15936910ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:45:16,604 16824455ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:52:16,392 17244242ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:56:53,679 17521529ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 10:56:57,235 17525086ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 11:10:17,408 18325258ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 11:56:27,089 21094940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 12:03:20,497 21508347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 12:03:26,982 21514833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 12:03:33,577 21521428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 13:27:42,053 26569904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 13:27:46,428 26574279ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 13:27:50,835 26578685ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:01:53,668 28621519ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:02:02,434 28630285ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:02:08,341 28636192ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:03:05,819 28693669ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:38:42,214 30830065ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-04 14:51:33,394 31601245ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:24:05,458 33553309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:24:09,912 33557762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:24:14,287 33562137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:30:46,188 33954039ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:31:37,723 34005574ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-04 15:33:14,697 34102548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:33:19,151 34107002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:33:23,541 34111392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:55:59,770 35467621ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:56:02,707 35470558ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 15:58:01,821 35589672ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 16:46:43,462 38511313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 16:46:47,870 38515721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 16:46:52,291 38520142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:38:57,121 41644971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:39:01,544 41649395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:39:05,965 41653816ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:47:34,716 42162567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:47:39,216 42167067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 17:47:46,748 42174599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:43:57,589 45545439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:44:02,214 45550065ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:44:06,886 45554737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:47:41,702 45769553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:47:46,109 45773960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:47:51,547 45779398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:56:42,529 46310380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:56:46,873 46314724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 18:56:51,249 46319100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:10:42,405 47150256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:10:46,781 47154631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:10:51,266 47159116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:35:41,939 48649789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:35:46,674 48654525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:35:51,081 48658932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:40:10,841 48918691ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 19:40:46,906 48954757ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 20:08:06,795 50594646ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 21:41:03,691 56171542ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 22:01:56,592 57424443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 22:02:01,014 57428865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 22:02:05,398 57433249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-04 22:21:37,352 58605202ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:07:14,551 64942402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:07:21,165 64949015ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:07:27,773 64955624ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:08:46,171 65034021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:08:52,828 65040678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:08:59,314 65047165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:11:50,983 65218834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:11:58,000 65225851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:12:04,830 65232681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:12:55,957 65283808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 00:13:02,957 65290808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 07:55:49,471 93057322ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-05 07:56:09,394 93077245ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-05 09:18:42,126 98029977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 09:18:46,720 98034571ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 09:18:51,049 98038900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 09:54:57,575 100205426ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-05 10:16:03,604 101471454ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 11:32:07,459 1630295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 11:32:14,523 1637359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 11:32:21,899 1644735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:01:01,154 3363990ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:01:05,888 3368724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:01:10,264 3373100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:02:10,334 3433170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:02:16,881 3439718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:02:24,585 3447421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:03:39,996 3522832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:04:03,666 3546502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:04:13,635 3556471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:05:06,406 3609242ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:05:12,938 3615774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:05:19,626 3622462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:39:40,133 5682969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:39:44,525 5687361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 12:39:48,868 5691704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 13:07:45,057 7367893ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 13:14:17,117 7759953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 15:17:36,981 15159817ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-05 15:37:18,243 16341079ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 15:37:44,135 16366971ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 16:56:50,733 21113569ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 16:57:06,937 21129773ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 16:57:15,236 21138072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 17:43:22,870 23905706ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:44:35,100 31177936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:44:42,241 31185077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:44:49,508 31192344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:45:32,354 31235190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:45:40,604 31243440ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:45:52,012 31254848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:46:57,612 31320448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:47:04,873 31327709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 19:47:15,905 31338741ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 20:05:44,006 32446842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 20:05:48,381 32451217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 20:05:52,960 32455796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:03:16,008 35898844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:03:20,399 35903235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:03:24,810 35907646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:04:58,153 36000989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:05:03,185 36006021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:05:09,576 36012412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 21:46:30,663 38493499ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-05 21:56:18,037 39080873ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-05 22:44:44,521 41987357ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:24:23,092 73165928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:24:29,437 73172273ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:24:36,016 73178852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:45:44,402 74447238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:45:50,855 74453691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 07:45:57,278 74460114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 08:36:53,101 77515937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 08:36:57,475 77520312ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 08:37:01,836 77524673ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 10:25:07,251 84010087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 10:25:11,674 84014510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 10:25:16,143 84018979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 10:38:24,012 84806848ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-06 10:48:58,278 85441114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:15:38,058 87040894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:15:42,152 87044988ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:15:42,433 87045269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:15:46,762 87049598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:24:36,884 87579720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:24:43,479 87586316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 11:24:50,026 87592862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 12:42:45,058 92267894ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-06 12:46:05,815 92468651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 12:46:11,034 92473870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 12:46:15,363 92478199ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:08:04,860 93787696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:08:12,314 93795150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:08:16,892 93799728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:57:00,049 96722885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:57:04,471 96727307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 13:57:08,847 96731683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 15:02:32,196 100655032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 15:02:36,617 100659454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 15:02:41,040 100663876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 16:01:32,901 104195737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 16:01:37,902 104200738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 16:01:42,293 104205129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 16:47:23,992 2536481ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 17:24:02,428 4734918ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-06 17:50:31,058 6323547ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 20:28:22,123 15794612ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 20:28:26,561 15799051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 20:28:32,229 15804718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 22:56:41,191 24693680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 22:56:45,676 24698165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 22:56:50,129 24702619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:17:48,265 25960754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:17:52,610 25965099ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:17:58,233 25970723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:37:07,129 27119618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:37:13,598 27126087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-06 23:37:20,286 27132776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 08:14:24,695 58157184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 08:55:25,093 60617582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 08:55:29,530 60622020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 08:55:33,937 60626427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 09:00:05,036 60897526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 09:00:09,710 60902199ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 09:00:14,507 60906996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 10:25:48,547 66041036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 10:25:52,940 66045429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 10:25:57,438 66049928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 11:11:17,387 68769876ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 11:22:54,630 69467119ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 11:24:01,105 69533594ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 11:30:40,924 69933414ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 11:32:01,813 70014302ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 13:57:24,823 78737312ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 14:52:51,970 82064459ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:06:36,980 82889470ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:06:41,778 82894268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:06:46,825 82899315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:06:55,326 82907815ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:06:59,996 82912485ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:07:04,777 82917267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:07:21,450 82933939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:07:26,091 82938581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:07:30,686 82943175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:23:24,566 83897055ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:40:12,002 84904491ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 15:40:33,487 84925976ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 16:01:12,332 86164822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:17:38,588 90751077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:18:23,086 90795575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:18:29,570 90802060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:47:58,424 92570913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:48:02,940 92575429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 17:48:08,441 92580930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 18:20:18,870 94511359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 18:20:25,354 94517844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 18:20:31,808 94524298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:07:35,449 97347938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:07:40,076 97352565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:07:44,717 97357206ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:08:28,362 97400851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:08:33,160 97405649ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 19:08:37,880 97410369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:07:51,214 100963703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:07:58,480 100970970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:08:02,919 100975408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:29:16,633 102249122ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 20:30:06,976 102299466ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 20:31:08,966 102361456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:31:13,405 102365894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:31:19,796 102372285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:38:08,396 102780885ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 20:38:15,679 102788169ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 21:46:18,070 2461454ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 21:53:39,125 2902509ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-07 21:59:19,610 3242994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 21:59:23,969 3247352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 21:59:29,594 3252978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 22:03:57,783 3521167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 22:04:04,237 3527620ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 22:04:10,768 3534152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 22:24:06,859 4730243ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-07 22:28:16,112 4979496ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 22:28:21,143 4984527ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-07 22:28:30,081 4993465ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-08 06:35:16,174 34199558ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-08 06:39:57,795 34481179ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-08 06:42:10,550 34613934ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 06:42:26,051 34629435ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-08 08:28:51,220 41014603ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 08:29:32,789 41056173ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:17:49,625 43953009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:17:54,079 43957462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:17:58,501 43961885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:18:37,411 44000795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:18:41,913 44005297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:18:46,451 44009835ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 09:33:37,157 44900541ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 10:31:54,987 48398371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 10:32:01,737 48405121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 10:32:06,098 48409481ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 10:32:45,408 48448792ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 11:02:02,693 50206077ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 11:02:30,961 50234345ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 12:45:40,628 56424012ms Service                MoveNext           - Running time: 15-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-07-08 12:49:40,531 56663915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 12:49:44,937 56668321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 12:49:49,344 56672728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 13:15:38,857 58222240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 13:15:43,217 58226600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 13:15:47,545 58230929ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:22:33,296 62236680ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:37:35,853 63139237ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:37:47,167 63150551ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:39:21,312 63244696ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:47:24,266 63727650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:47:30,876 63734259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:47:35,251 63738635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:53:05,067 64068451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:53:09,757 64073141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:53:14,384 64077768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 14:57:38,153 64341537ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:00:05,535 64488919ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:19:35,796 65659180ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:21:03,399 65746782ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:22:35,059 65838443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:22:40,636 65844020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:22:46,371 65849755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:22:52,638 65856022ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:30:36,334 66319718ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:46:12,607 67255991ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:47:54,463 67357847ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:47:59,323 67362707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:48:06,683 67370067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:48:13,935 67377319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:48:56,016 67419400ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:49:42,567 67465951ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:51:26,234 67569617ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:51:41,999 67585383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:51:49,595 67592979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:51:58,985 67602369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:55:10,230 67793614ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:55:38,326 67821710ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:56:34,648 67878032ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:57:25,630 67929013ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:58:31,773 67995157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:59:08,684 68032067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:59:27,466 68050850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 15:59:57,450 68080833ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:00:48,736 68132119ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:01:12,192 68155576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:01:19,551 68162935ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:01:26,973 68170357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:02:12,827 68216210ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:02:21,843 68225227ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:02:47,064 68250448ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:02:58,109 68261493ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:03:52,286 68315670ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:04:07,647 68331031ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:05:06,783 68390167ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:06:49,089 68492473ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:08:18,246 68581629ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:08:26,575 68589958ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:08:33,388 68596771ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:09:09,719 68633103ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:09:27,377 68650761ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:16:56,224 69099608ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:18:36,829 69200213ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:20:11,369 69294753ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:20:59,889 69343273ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:31:01,329 69944712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:31:08,862 69952246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:31:15,409 69958793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:59:37,323 1513894ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 16:59:56,151 1532723ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:00:26,889 1563460ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:01:06,205 1602776ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:02:14,601 1671172ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:02:19,289 1675861ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:03:16,685 1733256ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:03:46,827 1763399ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:05:24,899 1861471ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:16:01,277 2497849ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:16:06,683 2503254ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:16:15,559 2512131ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:17:27,548 2584120ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:17:47,984 2604555ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:17:59,735 2616306ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-08 17:34:02,206 3578778ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 20:34:46,573 14423145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 20:34:51,308 14427879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 20:34:57,246 14433817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:14:55,560 16832132ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-08 21:17:15,921 16972492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:17:23,406 16979978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:17:30,728 16987300ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:54:12,566 19189137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:54:19,394 19195966ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 21:54:23,770 19200341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 22:14:50,816 20427388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 22:14:55,223 20431794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-08 22:14:59,629 20436201ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 00:28:31,416 28447987ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 01:19:32,888 31509460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 01:19:37,279 31513851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 01:19:41,655 31518226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 05:36:58,880 12610736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 05:37:03,318 12615175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 05:37:07,647 12619503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 08:25:02,827 22694684ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 08:29:53,067 22984924ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 09:05:53,088 25144944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:06:01,057 25152914ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:06:05,511 25157368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:20:35,961 26027817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:20:42,368 26034224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:20:47,851 26039708ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:21:59,982 26111839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:22:05,733 26117589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:22:11,327 26123184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:22:34,316 26146173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:22:41,269 26153125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:22:47,472 26159329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 09:55:51,205 28143062ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 10:28:00,114 30071971ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 10:28:30,866 30102722ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 11:47:58,750 34870607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 11:48:03,212 34875068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 11:48:07,658 34879515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 11:51:32,421 35084278ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:36:16,608 41368465ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:39:25,075 41556931ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:39:30,997 41562853ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:41:03,508 41655364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:41:07,915 41659771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:41:12,337 41664194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:46:56,087 42007944ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 13:54:39,716 42471572ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 14:26:04,508 44356364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 14:26:08,898 44360754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 14:26:13,274 44365131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:38:28,526 48700383ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:39:18,111 48749968ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:39:31,392 48763249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:39:35,784 48767640ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:39:41,363 48773219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:49:00,337 49332193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:49:04,759 49336616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:49:09,119 49340976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:50:53,777 49445634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:50:58,200 49450057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 15:51:02,669 49454526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:01:57,613 50109470ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:19:50,867 51182724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:38:07,849 52279706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:42:25,522 52537378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:42:30,163 52542019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:42:35,961 52547817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 16:46:07,330 52759187ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 17:04:45,666 53877523ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-09 17:42:21,633 56133489ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 18:37:25,094 59436950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 18:37:30,549 59442405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 18:37:34,923 59446779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 18:38:27,100 59498956ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 18:38:31,475 59503331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 18:38:35,944 59507801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 19:04:05,036 61036892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 19:04:09,504 61041361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 19:04:13,849 61045706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:20:03,989 65595846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:20:11,786 65603643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:20:16,193 65608049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:20:49,086 65640943ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:20:57,868 65649725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:21:06,010 65657866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 20:25:29,898 65921755ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 20:29:59,276 66191132ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 20:34:56,570 66488427ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 20:47:46,946 67258802ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-09 22:03:47,348 71819205ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-09 22:26:21,241 73173097ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 00:05:36,643 79128500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 00:05:44,909 79136766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 00:05:55,849 79147705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:05:17,820 104309676ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:26:45,109 1268006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:26:49,518 1272415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:26:53,875 1276772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:28:32,368 1375265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:28:36,728 1379625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:28:41,103 1384000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:35:48,466 1811363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:44:14,043 2316940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:44:18,387 2321284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 07:44:22,746 2325643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 08:22:46,424 4629321ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:21:07,434 8130331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:21:17,075 8139972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:21:24,700 8147597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:25:25,206 8388103ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:43:09,113 9452010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:43:15,691 9458588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 09:43:22,254 9465151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:26:38,357 12061254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:26:42,953 12065850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:26:47,560 12070457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:27:31,909 12114806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:27:36,565 12119462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:27:41,160 12124056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:30:28,286 12291183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:30:32,943 12295839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:30:37,552 12300449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:50:45,482 13508378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:50:50,108 13513005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:50:54,655 13517552ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:51:13,218 13536115ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:51:17,859 13540756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:51:22,500 13545397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:56:43,246 13866143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:56:53,903 13876800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:57:01,076 13883973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:57:39,563 13922460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:57:44,204 13927101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 10:57:50,877 13933774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:05:43,843 14406740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:05:48,654 14411551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:05:53,265 14416162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:21:40,566 15363463ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:26:14,364 15637261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:26:18,943 15641840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:26:23,537 15646434ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:39:06,212 16409109ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:47:09,181 16892078ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 11:49:40,835 17043732ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 12:21:59,855 18982752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 12:22:08,152 18991049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 12:22:17,466 19000363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:21:09,626 22532523ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:30:09,082 23071979ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:36:14,230 23437127ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:44:40,370 23943267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:44:47,814 23950711ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:44:55,099 23957996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:48:55,646 24198543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:49:02,209 24205106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:49:06,882 24209779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:50:22,732 24285629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:50:30,401 24293298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:50:37,651 24300547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 13:57:56,535 24739432ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 13:59:07,948 24810845ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:00:38,160 24901057ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:01:35,087 24957984ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:08:54,010 25396907ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:09:13,263 25416160ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:11:47,219 25570116ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 14:12:16,703 25599600ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 14:55:31,783 28194680ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:27:24,526 30107423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:27:32,167 30115064ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:27:44,623 30127520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:27:56,108 30139005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:28:00,482 30143379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:28:07,483 30150380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 15:55:38,067 31800964ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:04:01,682 32304579ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:07:02,912 32485809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:16:27,543 33050440ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:16:32,167 33055064ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:16:37,730 33060627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:25:37,287 33600184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:35:35,350 34198247ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:35:41,226 34204122ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:35:48,227 34211124ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:40:17,854 34480751ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:40:22,917 34485814ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:40:46,935 34509831ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:40:52,968 34515865ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:42:31,740 34614636ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:54:50,698 35353595ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 16:58:56,990 35599887ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:10:48,992 36311889ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:36:26,517 37849414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:36:33,081 37855977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:36:40,159 37863056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:45:23,837 38386734ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 17:51:19,901 38742798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:51:24,556 38747453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 17:51:29,198 38752094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:37:34,243 41517140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:37:42,337 41525234ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:37:53,327 41536224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:38:46,076 41588973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:38:53,343 41596240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:39:00,562 41603459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:39:15,517 41618414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:39:22,816 41625713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:39:30,691 41633588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:40:12,100 41674997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:40:19,491 41682388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 18:40:27,008 41689905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:07:18,237 43301134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:07:22,613 43305510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:07:26,958 43309855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:24:09,328 44312225ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:26:18,783 44441680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:26:23,259 44446156ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 19:26:27,712 44450609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:37:43,335 48726232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:37:48,117 48731013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:38:06,072 48748969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:51:19,181 49542078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:51:25,621 49548518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 20:51:32,107 49555004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:30:34,450 51897347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:30:38,873 51901770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:30:43,311 51906208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:32:02,329 51985226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:32:06,704 51989601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 21:32:11,143 51994040ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-10 22:18:29,724 54772621ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-10 22:36:19,447 55842344ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:36:33,011 55855908ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:36:38,216 55861113ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:36:49,634 55872531ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:36:53,976 55876873ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:37:24,963 55907860ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-10 22:48:11,345 56554242ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 07:53:49,848 89292745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 07:53:56,303 89299199ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 07:54:02,908 89305805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 08:31:29,485 91552382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 08:31:34,173 91557070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 08:31:38,705 91561602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 08:36:27,179 91850076ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 09:33:52,403 95295300ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 09:33:56,916 95299813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 09:34:01,354 95304251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 10:11:17,827 97540724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 10:11:22,186 97545083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 10:11:26,593 97549490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 11:35:55,218 102618115ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 11:44:54,939 103157836ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-11 13:51:21,079 6335347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 13:51:25,544 6339811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 13:51:29,951 6344218ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:01:57,937 6972204ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:04:02,984 7097251ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:07:02,506 7276773ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:08:08,812 7343079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:08:13,296 7347564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 14:08:19,328 7353595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:06:15,062 10829329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:06:22,282 10836549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:06:29,563 10843831ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:08:27,730 10961998ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 15:09:17,344 11011612ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 15:10:18,194 11072461ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 15:32:39,660 12413927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:32:47,082 12421349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:32:55,240 12429507ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:39:56,099 12850367ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:40:03,288 12857555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:40:10,506 12864774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:41:21,545 12935812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:41:28,672 12942939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 15:41:35,937 12950204ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 16:01:30,960 14145227ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 16:15:05,285 14959553ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 16:15:14,584 14968851ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 16:15:15,255 14969523ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:38:55,521 19989788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:39:02,598 19996866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:39:09,770 20004038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:54:41,299 20935567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:54:45,690 20939957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 17:54:50,081 20944348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:02:22,651 24996919ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:02:32,777 25007044ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:03:40,282 25074550ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:05:27,449 25181716ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:12:46,294 25620561ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:12:50,621 25624888ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:12:55,090 25629358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:14:20,552 25714820ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:14:29,399 25723667ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:14:44,744 25739011ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:44:39,155 27533423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:45:08,236 27562503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 19:53:35,989 28070256ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-11 19:54:09,266 28103533ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 20:43:18,837 31053104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 20:43:23,527 31057794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 20:43:28,197 31062464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 20:58:07,406 31941673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 21:05:07,775 32362042ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 21:06:56,145 32470413ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:09:45,950 36240218ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:17:59,349 36733616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:18:03,724 36737992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:18:08,163 36742430ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:18:43,396 36777664ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:18:47,740 36782007ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:18:53,757 36788024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:21:37,286 36951554ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:27:19,390 37293657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:27:23,796 37298063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:27:33,344 37307611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:30:57,237 37511504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:31:01,676 37515944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:31:06,082 37520349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:00,086 37934353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:04,476 37938744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:08,883 37943151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:30,838 37965106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:35,199 37969466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 22:38:39,558 37973826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 23:17:05,048 40279316ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 23:24:43,868 40738135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 23:24:48,290 40742557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-11 23:24:52,680 40746948ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:07:39,593 43313861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:07:44,000 43318268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:07:48,438 43322705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:12:27,606 43601874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:12:31,989 43606257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:12:36,414 43610681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:13:30,059 43664327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:13:35,638 43669905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:13:40,091 43674359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:15:22,819 43777087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:15:27,221 43781488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 00:15:31,627 43785895ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 08:03:01,025 71835292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 08:03:07,260 71841528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 08:03:11,870 71846137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 08:12:52,021 72426288ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 09:42:50,824 77825092ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 09:42:55,200 77829467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 09:42:59,591 77833858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:08:51,344 79385611ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:44:24,706 81518973ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:21,558 81755825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:24,668 81758935ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:27,809 81762076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:43,091 81777359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:46,201 81780468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:48:49,311 81783578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:49:28,970 81823238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:49:32,111 81826379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:49:35,221 81829488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:50:00,223 81854491ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:50:03,348 81857616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:50:03,521 81857788ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:50:06,458 81860726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 10:50:29,726 81883993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:02:42,359 82616627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:02:45,500 82619768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:02:48,626 82622893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:12:59,427 83233694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:13:05,803 83240070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 11:13:12,538 83246805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 13:50:46,824 92701091ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-12 13:58:39,986 93174253ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:18:56,037 780692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:19:00,662 785318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:19:05,225 789880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:19:13,304 797960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:19:17,867 802522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:19:22,398 807054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:49:58,674 2643330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:50:03,018 2647674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:50:07,331 2651987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 17:55:57,093 3001748ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-12 18:25:44,303 4788959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 18:25:48,647 4793303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 18:25:53,007 4797662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 19:38:53,750 9178405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 19:38:58,125 9182781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 19:39:02,484 9187140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:34:07,469 16092124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:34:12,070 16096725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:34:16,711 16101366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:35:02,121 16146776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:35:06,589 16151245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 21:35:12,074 16156730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:36:50,507 19855162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:36:54,851 19859506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:36:59,242 19863898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:46:14,634 20419289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:46:19,119 20423774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:46:23,494 20428150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:55:41,686 20986342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:55:46,109 20990764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:55:50,547 20995203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:59:23,156 21207811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:59:27,515 21212171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-12 22:59:31,844 21216500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:11:48,135 25552790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:11:52,557 25557213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:11:56,948 25561604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:12:42,718 25607373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:12:47,531 25612186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:12:51,953 25616609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:14:01,552 25686207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:14:06,302 25690958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 00:14:10,740 25695396ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 02:49:09,027 34993683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 02:49:13,465 34998120ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 02:49:17,793 35002449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 04:21:10,754 40515409ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 07:04:47,066 50331721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 07:04:53,581 50338237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 07:05:00,035 50344691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 09:51:59,381 60364037ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 09:52:33,040 60397696ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 09:59:41,119 60825775ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 09:59:46,870 60831526ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 09:59:55,089 60839745ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 10:33:34,035 62858691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 10:33:41,552 62866208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 10:33:48,661 62873317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 10:46:30,850 63635506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 10:46:35,273 63639928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 10:46:39,633 63644288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 13:17:44,211 72708866ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 13:18:49,404 72774060ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 14:49:00,751 78185406ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 14:59:17,341 78801997ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 15:20:00,617 80045273ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 16:53:07,447 85632103ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:40:36,415 88481071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:40:42,978 88487634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:40:49,448 88494104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:41:24,138 88528794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:41:30,717 88535373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:41:37,124 88541780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:51:56,720 89161376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:52:03,128 89167784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:52:09,598 89174253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 17:59:29,559 89614215ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 18:21:19,779 90924435ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:21:38,653 98143308ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:21:43,184 98147840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:21:47,654 98152309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:24:52,884 98337539ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:30:57,177 98701833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:31:03,616 98708272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:31:10,038 98714694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 20:46:14,880 99619536ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-13 22:03:10,615 104235270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 22:03:15,037 104239693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-13 22:03:19,412 104244068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 01:25:10,466 11933757ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 08:48:33,900 5655225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 08:48:39,339 5660664ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 08:48:43,682 5665007ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 09:25:30,958 7872283ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 09:41:01,554 8802879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 09:41:05,945 8807270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 09:41:10,367 8811692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 10:52:41,635 13102960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 10:52:50,214 13111539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 10:52:54,668 13115993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:14:01,004 14382329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:14:05,442 14386767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:14:09,724 14391049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:20:58,863 14800189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:21:05,817 14807143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:21:12,443 14813768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 11:48:56,789 16478114ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 12:06:33,131 17534457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 12:06:37,616 17538942ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 12:06:42,086 17543411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 14:30:39,248 26180573ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 14:41:18,955 26820280ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 14:49:09,243 27290568ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 15:05:47,587 28288912ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:05:54,213 28295538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:06:00,854 28302179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:10:08,899 28550224ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 15:23:45,231 29366556ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 15:46:10,614 30711939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:46:15,036 30716362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:46:19,474 30720799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 15:53:39,146 31160471ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 16:09:08,586 32089911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:09:16,345 32097670ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:09:21,006 32102331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:13:34,838 32356163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:14:21,420 32402745ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 16:15:04,771 32446096ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 16:15:14,257 32455582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:15:18,772 32460097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:15:23,429 32464754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 16:38:04,213 33825538ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 18:59:16,681 42298006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 18:59:21,322 42302647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 18:59:25,947 42307272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 19:02:02,877 42464202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 19:02:09,441 42470766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 19:02:17,035 42478360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 19:12:11,709 43073035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 20:19:35,601 47116926ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:00:17,572 49558897ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:07:21,366 49982692ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:18:23,660 50644985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:18:28,192 50649517ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:18:32,614 50653939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:22:50,900 50912225ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 21:24:41,826 51023151ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 21:34:08,504 51589829ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 21:34:52,119 51633444ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 21:42:02,365 52063690ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-14 23:13:38,375 57559700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 23:13:43,094 57564419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-14 23:13:47,688 57569013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 00:19:50,815 61532141ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 00:26:34,124 61935449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 00:26:38,484 61939809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 00:26:42,890 61944216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 08:17:11,259 90172584ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 08:43:06,165 91727490ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 08:50:14,773 92156099ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 09:38:14,861 95036186ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 09:48:10,031 95631356ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 09:51:12,222 95813547ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 09:57:08,187 96169512ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:06:15,740 96717065ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:16:16,353 97317679ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:23:14,422 97735747ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:27:39,038 98000363ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:42:47,101 98908426ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 10:47:29,879 99191204ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:47:58,929 99220254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:48:10,586 99231911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 10:52:56,521 99517846ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 11:17:44,938 101006263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 11:17:52,064 101013389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 11:18:01,314 101022639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 12:01:46,813 103648138ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:42:02,247 5251087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:42:06,717 5255556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:42:11,107 5259947ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:46:05,406 5494246ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 13:52:51,046 5899886ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:53:42,991 5951830ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:54:51,309 6020149ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 13:55:03,592 6032431ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 13:55:45,205 6074044ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 13:56:03,530 6092370ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 14:12:37,208 7086048ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 14:12:44,678 7093518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 14:12:51,898 7100738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 14:52:05,416 9454255ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 14:56:36,381 9725221ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 14:57:13,197 9762037ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 15:00:24,871 9953711ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 15:00:27,161 9956001ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 15:01:54,449 10043289ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 15:04:48,454 10217294ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 15:06:32,777 10321616ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 15:06:35,949 10324788ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 15:06:55,341 10344181ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 15:07:20,109 10368948ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 16:07:38,545 13987385ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 16:13:52,222 14361062ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 16:15:59,202 14488042ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 16:18:40,223 14649063ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-15 16:34:08,681 15577521ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 16:46:00,991 16289831ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 17:11:39,437 17828276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 17:11:46,782 17835622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 17:11:51,187 17840027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:12,281 20921121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:16,813 20925652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:21,282 20930121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:29,955 20938794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:34,471 20943310ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:39,018 20947858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:48,722 20957562ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:53,207 20962046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:03:57,691 20966531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:04:06,192 20975032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:04:10,708 20979548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:04:15,209 20984048ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:31:46,583 22635422ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:31:53,599 22642438ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:32:00,865 22649705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 18:44:15,681 23384520ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 19:53:58,516 27567356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 19:54:05,782 27574622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 19:54:12,861 27581700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:07:49,166 28398006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:07:53,806 28402646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:07:58,463 28407303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:08:45,888 28454728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:08:50,497 28459337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:08:55,170 28464010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 20:37:43,624 30192463ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 21:01:52,753 31641593ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-15 21:39:42,457 33911296ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 21:39:49,004 33917844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 21:39:55,583 33924423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 22:37:46,825 37395665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 22:37:51,216 37400056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-15 22:37:55,623 37404463ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 00:06:33,699 42722539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 00:06:40,136 42728975ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 00:06:46,638 42735477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 08:09:07,784 71676624ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 10:06:47,145 78735985ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 10:25:08,854 79837694ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:08:50,352 82459192ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:19:10,221 83079061ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:19:14,659 83083499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:19:19,034 83087874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:25:30,480 83459320ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:34:22,603 83991443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:34:29,103 83997943ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 11:34:35,416 84004256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 12:44:03,262 88172101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 12:44:07,636 88176476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 12:44:12,012 88180852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 13:41:59,328 91648168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 13:42:03,703 91652543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 13:42:08,173 91657012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 13:59:49,585 92718425ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:19:06,200 93875039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:19:14,779 93883619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:19:21,951 93890791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:48:32,732 95641572ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:48:47,282 95656121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:48:59,735 95668574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:49:08,204 95677044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:57:27,881 96176721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:57:32,522 96181362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:57:37,085 96185924ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:58:04,681 96213521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:58:09,306 96218146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:58:13,869 96222709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:59:18,997 96287837ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:59:26,031 96294870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 14:59:30,641 96299480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:00:11,608 96340448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:00:16,171 96345010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:00:20,781 96349621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:02:06,952 96455792ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:24:34,742 97803581ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:27:12,148 97960988ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:27:40,394 97989233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 15:27:44,863 97993703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:05:24,735 100253574ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:12:57,163 100706003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:13:04,038 100712878ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:13:12,679 100721518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:13:28,853 100737693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:13:36,931 100745771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 16:13:43,526 100752365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 18:38:29,362 5026458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 18:38:33,831 5030927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 18:38:38,206 5035302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-16 21:12:06,752 14243848ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 03:23:35,601 36532697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 03:23:40,071 36537166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 03:23:44,493 36541589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:36:44,655 48121751ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:36:51,484 48128580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:36:58,330 48135425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:37:26,081 48163177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:37:32,597 48169693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:37:41,395 48178490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:38:14,773 48211869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:38:21,586 48218682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:38:28,149 48225245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:39:55,454 48312549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:40:01,876 48318972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 06:40:08,408 48325504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 07:02:45,355 49682450ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 07:09:01,376 50058471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 07:09:08,033 50065128ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 07:09:14,486 50071582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 07:27:29,565 51166661ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 08:35:40,466 55257561ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 08:36:05,499 55282594ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:31:24,709 58601805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:31:32,461 58609557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:31:38,789 58615885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:36:51,516 58928612ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:49:10,471 59667567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:49:17,644 59674740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 09:49:24,897 59681993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:01:20,329 60397424ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:01:25,630 60402726ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:01:50,934 60428029ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:02:12,393 60449489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:24:43,603 61800699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:24:48,072 61805167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:24:52,743 61809839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:26:50,542 61927638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:27:03,404 61940500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 10:27:09,638 61946734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 11:26:14,759 65491854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 11:26:19,134 65496230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 11:26:25,681 65502777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 11:45:07,014 66624110ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 11:46:50,372 66727468ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-17 13:10:03,476 71720572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 13:10:08,143 71725238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 13:10:12,712 71729808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:04:48,053 75005149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:05:13,508 75030604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:05:26,526 75043622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:05:38,949 75056045ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:05:51,950 75069045ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:06:17,422 75094518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:12:22,099 75459195ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 14:43:14,887 77311983ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 15:35:47,422 80464518ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 15:35:55,798 80472894ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:26:40,658 90717753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:26:47,205 90724301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:26:53,706 90730802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:31:29,156 91006252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:31:35,656 91012752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 18:31:42,157 91019253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:00:57,484 92774580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:01:04,093 92781189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:01:10,735 92787830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:01:20,532 92797628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:01:27,236 92804331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:01:33,862 92810957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:19:40,033 93897129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:19:44,597 93901693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:19:49,035 93906131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:20:11,897 93928993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:20:16,257 93933352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 19:20:20,616 93937712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:40:49,304 98766400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:40:56,882 98773978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:41:08,477 98785573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:52:43,190 99480286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:52:47,690 99484786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 20:52:52,081 99489177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 21:58:32,278 103429374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 21:58:36,888 103433983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 21:58:41,498 103438593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:16:46,112 109181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:16:50,675 113745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:16:55,175 118245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:36:25,139 1288208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:36:29,561 1292631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:36:33,983 1297053ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:23,454 1646523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:27,830 1650899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:32,189 1655259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:47,956 1671026ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:52,331 1675401ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:42:56,675 1679745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:49:28,893 2071962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:49:35,768 2078838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 22:49:42,784 2085854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 23:48:30,563 5613633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 23:48:35,034 5618104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-17 23:48:39,392 5622462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 06:47:23,206 30746276ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:03:09,599 35292669ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:16:05,036 36068105ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:55:32,367 38435437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:55:36,764 38439834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:55:41,228 38444298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:55:55,074 38458144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:55:59,450 38462520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 08:56:03,827 38466897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 09:31:38,019 40601089ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 10:13:19,227 43102297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 10:13:25,009 43108079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 10:13:29,462 43112532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 11:08:26,018 46409088ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 12:39:23,791 51866861ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 12:41:45,618 52008687ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 14:31:44,867 58607936ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 15:03:08,549 60491618ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 15:58:44,781 63827851ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:02:34,894 64057963ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:10,151 64993221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:14,901 64997970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:19,432 65002502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:30,137 65013207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:34,559 65017629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 16:18:39,028 65022098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 18:27:11,240 72734309ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 18:31:13,335 72976405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 18:31:17,663 72980733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 18:31:22,070 72985140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 21:02:00,255 82023325ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 21:02:16,725 82039795ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-18 21:16:30,891 82893961ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-18 21:28:37,353 83620423ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 07:12:00,134 14170715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 07:12:06,713 14177294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 07:12:13,166 14183747ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 08:18:12,787 18143368ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 08:18:15,287 18145868ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 09:46:10,394 23420975ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:10:14,017 28464598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:10:18,674 28469255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:10:22,987 28473568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:12:10,455 28581036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:12:14,783 28585364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:12:20,347 28590928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:15:49,615 28800196ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:22:19,216 29189797ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 11:46:58,529 30669110ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 13:17:48,107 36118688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 13:17:55,139 36125720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 13:18:06,030 36136611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:28:31,061 40361642ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:28:56,341 40386922ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:29:32,289 40422871ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:30:05,324 40455905ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:35:24,313 40774894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:35:28,704 40779285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:35:33,016 40783597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:35:44,455 40795036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:35:48,846 40799427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:35:53,284 40803865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:42:48,574 41219155ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:47:14,628 41485209ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 14:54:49,094 41939675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:54:53,703 41944285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 14:54:58,329 41948910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 15:00:08,776 42259357ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 15:05:51,599 42602180ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 15:12:05,436 42976017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 15:12:10,046 42980627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 15:12:14,624 42985205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 17:20:06,643 50657224ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 20:01:02,117 60312698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 20:01:07,680 60318261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 20:01:12,009 60322590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 20:50:30,571 63281152ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 21:27:51,147 65521728ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 21:53:19,598 67050179ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-19 22:14:13,943 68304524ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-19 22:45:15,358 70165939ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-19 22:45:31,797 70182378ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-20 02:15:21,921 82772502ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 02:15:26,610 82777191ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 02:15:31,156 82781737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 04:25:27,045 90577626ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-20 08:35:55,958 1245481ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 10:06:51,532 6701056ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:09:59,473 10488996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:10:03,958 10493481ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:10:08,395 10497919ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:10:34,617 10524140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:10:38,962 10528486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:10:43,307 10532830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:41:08,451 12357974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:41:14,857 12364381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:41:21,140 12370663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:57:51,416 13360939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:57:58,667 13368190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 11:58:05,871 13375394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 15:44:39,071 26968595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 15:44:44,744 26974267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 15:44:49,182 26978705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 17:41:59,804 34009327ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 18:49:44,988 38074511ms Service                ricingTicketRefund - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefundCheck(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.PricingTicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-07-20 23:14:58,480 53988003ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-20 23:33:17,995 55087518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 23:33:22,464 55091987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-20 23:33:26,902 55096426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 07:52:36,233 85045757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 07:52:41,671 85051194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 07:52:46,218 85055742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 08:15:45,986 86435510ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 08:21:30,052 86779576ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 08:24:44,159 86973682ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 08:25:25,725 87015249ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 08:59:50,027 89079551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 08:59:54,403 89083926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 08:59:58,794 89088317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:09:05,082 89634605ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:20:19,893 90309416ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:20:26,315 90315838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:20:38,957 90328480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:21:22,369 90371893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:21:30,887 90380410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:21:37,214 90386738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:25:26,460 90615983ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 09:25:34,663 90624187ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 10:39:30,616 95060140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 10:39:35,226 95064749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 10:39:40,914 95070437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:03:10,987 96480511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:03:17,550 96487074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:03:24,894 96494417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:15:16,606 97206129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:15:21,013 97210536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:15:25,653 97215177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:27:32,350 97941873ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:28:30,588 98000111ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:28:34,947 98004471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 11:28:39,354 98008878ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 13:40:34,500 1517044ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 14:55:46,389 6028933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 14:55:47,983 6030527ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-21 14:55:50,843 6033387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 14:55:55,280 6037824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:00,364 6522908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:04,785 6527328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:09,381 6531924ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:34,836 6557379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:39,462 6562005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:04:43,978 6566521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 15:55:49,190 9631733ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 15:59:41,821 9864365ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:35:26,830 12009373ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:35:45,753 12028297ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-21 16:35:47,535 12030078ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:35:56,191 12038735ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-21 16:36:01,692 12044236ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:36:18,288 12060832ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:36:30,132 12072676ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:36:43,305 12085849ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:36:54,900 12097444ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:37:13,323 12115867ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:37:22,388 12124932ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:38:49,176 12211720ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:38:54,473 12217017ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:39:02,177 12224721ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:39:03,724 12226268ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 16:40:29,654 12312197ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 17:16:22,111 14464655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 17:16:26,533 14469077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 17:16:30,938 14473482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 17:29:32,750 15255294ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 17:34:39,739 15562282ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 17:38:06,053 15768596ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-21 18:11:38,884 17781427ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:13:06,016 17868559ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:19:22,966 18245510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:19:29,545 18252089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:19:35,968 18258511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:20:39,453 18321997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:20:46,016 18328560ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 18:20:52,611 18335154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 19:30:04,672 22487215ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 19:48:24,260 23586803ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 19:51:18,732 23761276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 19:51:23,311 23765854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 19:51:27,719 23770262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 21:27:42,658 29545202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 21:27:47,267 29549811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-21 21:27:51,861 29554405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 00:09:33,369 39255913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 00:09:37,776 39260319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 00:09:42,245 39264789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 08:44:27,436 70149980ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 09:32:11,870 73014413ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 09:55:17,412 74399956ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 11:19:07,992 79430536ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 11:19:19,353 79441896ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 11:56:13,577 81656121ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 11:56:25,577 81668121ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 12:21:49,752 83192296ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-22 12:57:18,246 85320789ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:22:33,543 90436086ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:22:37,995 90440539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:22:43,478 90446022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:27:00,921 90703465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:27:08,219 90710763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:27:15,500 90718044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:31:02,731 90945274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:31:10,028 90952572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 14:31:17,467 90960011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 15:15:21,423 93603967ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 15:43:07,966 95270510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 15:43:12,403 95274946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 15:43:16,795 95279339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:35:46,709 98429253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:35:54,304 98436847ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:36:05,148 98447692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:40:53,484 98736028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:40:58,187 98740731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:41:02,985 98745529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 16:41:58,769 98801313ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:19:49,045 101071589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:19:54,547 101077091ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:20:00,891 101083435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:47,997 101850541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:49,935 101852479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:52,747 101855290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:54,404 101856948ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:57,389 101859932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:32:58,764 101861307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:34:27,726 101950269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:34:32,193 101954736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:34:36,632 101959175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:37:25,630 102128174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:37:30,084 102132628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:37:34,477 102137021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:42:39,758 102442301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:42:44,180 102446724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 17:42:48,633 102451177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-22 20:32:53,328 8244972ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-22 20:36:19,375 8451020ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-22 22:44:44,497 16156142ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 07:51:15,631 48947275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 07:51:22,258 48953902ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 07:51:28,774 48960418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 08:07:03,974 49895618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 08:07:10,740 49902385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 08:07:17,241 49908885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 09:27:47,665 54739309ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:28:03,057 54754701ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:29:25,752 54837396ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:34:41,012 55152657ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:34:55,373 55167017ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:35:12,984 55184628ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 09:39:48,224 55459869ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 10:11:48,991 57380636ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 10:19:07,630 57819275ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 10:44:06,739 59318384ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 11:30:32,100 62103745ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 11:40:16,230 62687874ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 11:40:18,715 62690359ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 11:40:26,105 62697750ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 11:43:52,512 62904157ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 13:34:25,030 69536674ms Service                ricingTicketRefund - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefundCheck(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.PricingTicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-07-23 14:07:34,913 71526558ms RestRSFactory          ReadPassenger      -    at VietnamAirlines.Api.Rest.RestRSFactory.ReadPassenger(Booking resp, VNABookingRecord bookingRecord)Object reference not set to an instance of an object.
ERROR 2025-07-23 15:39:51,435 77063080ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:39:54,498 77066142ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:42:27,892 77219536ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:42:32,941 77224586ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:42:38,192 77229836ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:42:48,710 77240354ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 15:43:17,869 77269513ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 17:10:54,665 4145253ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 17:59:57,510 7088098ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-23 19:56:53,399 14103987ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 21:31:13,055 19763643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 21:31:17,588 19768176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-23 21:31:22,025 19772613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 01:21:35,483 7559566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 01:21:39,905 7563988ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 01:21:44,219 7568301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 09:16:22,879 36046962ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 09:46:15,090 37839173ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:13:28,540 39472623ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:13:35,478 39479561ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:13:39,916 39483999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:17:08,502 39692584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:17:12,893 39696976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:17:17,315 39701398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:25:18,458 40182541ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:33:29,094 40673177ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:48:26,531 41570614ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 10:48:31,625 41575708ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 11:19:50,453 43454535ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 11:39:24,160 44628243ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 13:45:54,866 52218948ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 13:46:03,038 52227121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 13:46:09,976 52234059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:12:08,554 53792637ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:16:24,060 54048143ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:20:11,247 54275330ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:20:17,326 54281409ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:27:34,020 54718103ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:34:07,464 55111546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:34:31,256 55135339ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:51:50,444 56174526ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:51:54,960 56179043ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 14:53:21,746 56265828ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:05:38,875 57002958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:05:43,265 57007348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:05:47,657 57011740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:08:19,898 57163981ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:29:00,268 58404351ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:36:57,952 58882035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:37:02,297 58886380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:37:06,703 58890786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:41:54,589 59178671ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:49:32,400 59636483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:49:37,854 59641937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 15:49:42,245 59646328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 16:30:48,691 62112773ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:01:01,869 63925952ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:01:06,229 63930311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:01:10,636 63934718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:02:10,141 63994223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:02:14,766 63998849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:02:19,298 64003381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:10:39,895 64503978ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:25:11,694 65375777ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 17:41:13,146 66337228ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 19:18:43,128 72187211ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-24 19:49:21,963 74026046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 19:49:26,448 74030531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 19:49:30,870 74034952ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 19:57:04,430 74488513ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 20:41:17,302 77141385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 20:41:21,864 77145947ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 20:41:26,286 77150369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:21:31,283 79555366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:21:38,441 79562524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:21:45,114 79569196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:43:18,897 80862979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:43:23,335 80867418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:43:27,897 80871980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 21:46:49,676 81073759ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-24 23:12:30,061 86214144ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-25 08:26:48,339 14933183ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 08:48:07,219 16212063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 08:48:11,657 16216501ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 08:48:16,065 16220909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 10:02:43,536 20688380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 10:02:47,939 20692783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 10:02:53,536 20698380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 11:04:48,834 24413678ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-25 11:10:14,041 24738885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 11:10:18,512 24743356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 11:10:23,229 24748073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:41:12,336 37397180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:41:28,150 37412994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:42:26,640 37471484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:42:55,418 37500262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:03,159 37508003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:03,690 37508534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:11,159 37516003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:11,878 37516722ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:15,082 37519926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:16,362 37521207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:18,535 37523379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:23,676 37528520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:23,723 37528567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:25,911 37530755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:27,583 37532427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:27,598 37532442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:31,677 37536521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:33,099 37537943ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:43:35,614 37540459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:44:09,680 37574524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:44:43,388 37608232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:44:50,794 37615638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:44:54,685 37619529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:44:59,217 37624061ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:45:57,831 37682675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:46:13,473 37698317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:46:26,302 37711146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:46:50,569 37735413ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:47:50,296 37795140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:47:56,501 37801345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:17,548 37822392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:18,923 37823767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:21,674 37826518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:21,752 37826596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:23,393 37828237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:26,065 37830909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:27,346 37832190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:48:33,597 37838441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:49:28,664 37893508ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:49:32,602 37897446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:49:37,174 37902018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:52:50,970 38095814ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 14:54:33,999 38198843ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:00:58,611 38583455ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:01:18,769 38603613ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:01:56,459 38641303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:26:23,775 40108619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:26:30,197 40115041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:26:36,573 40121417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:26:50,951 40135795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:26:57,294 40142138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 15:27:03,794 40148639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 16:41:24,957 44609801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 16:41:31,302 44616146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 16:41:37,303 44622147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:00:38,880 49363724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:00:43,287 49368131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:00:47,662 49372506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:39:59,562 51724406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:40:06,625 51731469ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 18:40:13,610 51738454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:01:55,117 60239961ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:01:59,773 60244618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:02:04,430 60249274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:09:35,174 60700018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:09:39,831 60704675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 21:09:44,487 60709331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:10:01,192 64326036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:10:05,678 64330522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:10:10,054 64334898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:12:37,331 64482175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:12:44,660 64489504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:12:51,802 64496646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:38:08,106 66012950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:38:12,512 66017356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:38:17,184 66022028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:53:37,182 66942026ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:53:44,292 66949136ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:53:51,527 66956371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:54:31,515 66996359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:54:39,328 67004172ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-25 22:54:47,704 67012548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 00:25:07,318 72432162ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-26 06:46:36,799 95321643ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-26 07:33:59,140 98163984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 07:34:03,531 98168375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 07:34:09,063 98173907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 09:52:34,498 2198327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 09:52:40,951 2204780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 09:52:47,342 2211171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 11:41:30,834 8734663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 11:41:37,777 8741606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 11:41:44,653 8748482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 13:03:30,486 13654315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 13:03:35,017 13658846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 13:03:39,596 13663425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:00,354 19444184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:04,792 19448621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:09,168 19452997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:25,857 19469686ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:30,263 19474092ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:40:34,670 19478499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 14:56:01,583 20405412ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:10:52,432 24896261ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:20:27,199 25471028ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:42:19,645 26783474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:42:26,739 26790568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:42:34,724 26798553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 16:53:38,411 27462240ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 17:37:36,503 30100332ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 17:37:41,050 30104879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 17:37:45,582 30109411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:17:34,648 43298477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:17:40,962 43304791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:17:47,321 43311150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:06,511 43330340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:12,886 43336715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:19,777 43343606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:41,842 43365671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:48,187 43372016ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:18:54,531 43378360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:19:04,016 43387845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:19:10,407 43394236ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 21:19:16,751 43400580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 22:48:34,167 48757996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 22:48:40,558 48764387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 22:48:47,512 48771341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-26 23:30:03,985 51247814ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-26 23:30:08,329 51252158ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-27 00:03:13,048 53236877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 00:03:17,486 53241315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 00:03:21,893 53245722ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 07:33:43,559 80267389ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-27 07:33:48,169 80271998ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:17:50,950 93714779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:17:57,997 93721826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:18:04,826 93728655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:19:58,447 93842276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:20:05,417 93849246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:20:12,480 93856309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:21:10,438 93914267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:21:17,486 93921315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 11:21:24,454 93928283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:10:13,637 100457466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:10:20,116 100463945ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:10:26,397 100470226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:24:24,120 101307949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:24:28,699 101312528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 13:24:33,246 101317075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 15:01:13,879 2710368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 15:01:20,505 2716994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 15:01:26,801 2723290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 16:46:00,513 8997001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 16:46:05,045 9001533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 16:46:09,654 9006143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 17:15:44,128 10780617ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 17:15:48,520 10785008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 17:15:52,958 10789446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-27 17:50:39,124 12875613ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-27 23:36:26,221 33622710ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 08:19:01,828 64978317ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 09:56:34,445 70830934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 09:56:40,899 70837388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 09:56:47,183 70843671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 10:57:05,303 74461792ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 10:58:28,614 74545102ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 10:58:32,972 74549461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 10:58:37,363 74553852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:15:13,844 75550333ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:22:34,441 75990930ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:28:14,316 76330804ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:32:01,685 76558174ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:43:51,323 77267812ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:44:39,452 77315941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:44:45,891 77322380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 11:44:52,266 77328755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:28:29,000 79945489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:28:33,579 79950067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:28:38,626 79955115ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:48:11,967 81128456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:49:18,286 81194774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:57:41,283 81697772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:57:45,768 81702257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:57:50,628 81707116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:59:49,966 81826455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 12:59:58,544 81835033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:00:03,341 81839830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:00:39,986 81876474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:00:44,798 81881287ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:00:52,658 81889147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:01:46,445 81942933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:01:51,304 81947793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 13:01:55,789 81952278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 15:17:17,380 90073869ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:02:30,696 92787184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:02:35,321 92791809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:02:40,214 92796702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:09:24,085 93200573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:09:29,586 93206074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 16:09:34,086 93210574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 17:11:03,286 96899775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 17:11:08,287 96904776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 17:11:13,503 96909992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-28 17:58:26,855 99743344ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 19:30:55,427 877768ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-28 22:01:05,668 9888009ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 00:04:45,632 17307973ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 08:52:16,508 48958848ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:11:16,891 50099232ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:22:40,511 50782852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:22:45,371 50787712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:22:50,122 50792463ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:33:04,603 51406944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:33:09,149 51411490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:33:14,243 51416584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 09:44:27,407 52089748ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 11:15:47,187 57569528ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:24:25,521 61687862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:24:33,234 61695575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:24:43,064 61705405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:25:02,925 61725266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:25:10,317 61732658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:25:17,864 61740205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 12:46:24,771 63007112ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 14:02:59,354 67601695ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 14:31:19,150 69301491ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 14:31:31,542 69313883ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 14:31:39,902 69322243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 15:10:21,920 71644261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 15:10:26,529 71648870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 15:10:31,296 71653637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:02:56,394 74798735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:03:01,144 74803485ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:03:05,832 74808173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:13:51,513 75453854ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:43:28,195 77230536ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:43:33,726 77236067ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:47:58,433 77500774ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 16:49:07,627 77569968ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 17:03:49,357 78451698ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-29 17:37:37,992 80480333ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 18:10:01,528 82423869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 18:10:06,231 82428572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 18:10:10,982 82433323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 20:36:23,395 91205736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 20:36:31,442 91213783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 20:36:40,208 91222549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 21:06:24,240 93006581ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:29:14,482 97976823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:29:19,138 97981479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:29:23,906 97986247ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:30:10,943 98033284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:30:15,756 98038097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-29 22:30:20,685 98043026ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:14:43,062 104305403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:14:47,891 104310232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:14:52,313 104314654ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:17:48,520 78291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:17:53,440 83211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 00:17:58,124 87896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:03:40,028 2921564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:03:46,872 2928408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:03:53,685 2935221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:05:49,633 3051169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:05:55,571 3057107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:06:00,031 3061568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:08:19,590 3201126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:08:26,435 3207971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:08:33,014 3214550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:09:34,160 3275696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:09:40,879 3282415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:09:47,645 3289181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:23:09,526 4091062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:23:17,839 4099376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 08:23:29,091 4110627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 09:42:49,294 8870831ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 09:42:53,873 8875410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 09:42:58,438 8879974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:16:50,873 10912409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:16:57,811 10919347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:17:04,812 10926348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:28:02,557 11584093ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:28:08,439 11589975ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:28:23,675 11605211ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:34:29,413 11970950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:34:34,758 11976294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:34:39,696 11981232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:46:14,705 12676241ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:46:21,018 12682554ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:49:38,772 12880308ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 10:55:10,949 13212485ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 11:03:25,730 13707266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 11:03:30,356 13711892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 11:03:35,684 13717221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:28:54,629 18836165ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:29:03,145 18844681ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:29:13,974 18855510ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:29:22,084 18863620ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:30:10,198 18911734ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:30:45,633 18947169ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:31:07,979 18969515ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:31:29,523 18991059ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:32:08,467 19030003ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:36:12,482 19274018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:36:17,716 19279253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:36:22,358 19283894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:45:53,152 19854688ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:45:58,763 19860299ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 12:47:45,881 19967417ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 13:45:22,462 23423998ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 14:37:19,820 26541356ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:34:45,076 29986612ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:34:50,014 29991550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:34:54,577 29996113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:53:50,582 31132118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:53:58,255 31139791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:54:04,271 31145807ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:58:03,333 31384869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:58:08,100 31389636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 15:58:13,287 31394824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 16:49:56,914 34498450ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-30 18:36:57,245 40918782ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 18:37:02,089 40923626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 18:37:07,493 40929030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 19:47:52,924 45174460ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 19:47:55,815 45177351ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 19:52:23,420 45444956ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 20:13:03,101 46684637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 20:13:07,914 46689451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 20:13:12,524 46694060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 20:28:22,070 47603606ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 22:57:23,072 56544608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 22:57:27,650 56549186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 22:57:32,213 56553749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:13:39,230 57520767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:13:43,731 57525267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:13:48,810 57530346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:16:27,980 57689516ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:16:32,746 57694282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-30 23:16:37,622 57699158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 00:05:36,780 60638316ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 00:05:59,064 60660600ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:21:29,025 86790561ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:21:35,713 86797250ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:21:42,715 86804251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:29:20,947 87262483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:29:25,682 87267218ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:29:30,260 87271796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:41:52,975 88014511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:41:57,725 88019261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 07:42:02,491 88024028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:22:02,573 90424110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:22:07,355 90428892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:22:11,949 90433486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:24:50,999 90592536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:24:55,437 90596973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:25:00,203 90601740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 08:31:30,166 90991702ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:52:38,372 95859908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:52:45,325 95866861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:52:52,264 95873800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:54:19,193 95960729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:54:26,194 95967730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 09:54:32,709 95974246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 10:09:19,723 96861260ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:07:18,172 100339708ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:07:24,110 100345646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:07:29,970 100351506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:19:19,764 101061300ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:19:24,421 101065957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:19:28,967 101070504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:21:12,268 101173804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:21:16,941 101178477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:21:21,769 101183305ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:27:22,261 101543797ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 11:47:13,114 102734650ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 12:03:46,288 103727825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 12:03:51,055 103732591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 12:03:55,791 103737327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 12:04:02,892 103744429ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 12:04:38,770 103780307ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:42:43,096 5252789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:42:47,815 5257508ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:42:52,472 5262165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:43:59,900 5329593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:44:04,838 5334531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 13:44:09,713 5339406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:16:26,537 7276230ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:16:35,022 7284715ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:16:57,602 7307295ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:19:19,071 7448764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:19:23,525 7453218ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:19:28,213 7457906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:26:58,001 7907694ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:33:57,480 8327174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:34:05,763 8335456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 14:34:13,560 8343253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:01:03,425 13553118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:01:08,394 13558088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:01:13,442 13563135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:14:29,786 14359479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:14:37,223 14366916ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:14:43,989 14373682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:36:39,373 15689066ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:44:47,730 16177423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:46:17,002 16266695ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 16:50:12,287 16501981ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-07-31 18:35:47,505 22837198ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 23:34:25,940 40755633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-07-31 23:35:12,616 40802309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 08:41:09,858 5554167ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 10:31:16,067 12160376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 10:31:22,942 12167251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 10:31:29,324 12173634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 10:48:19,077 13183386ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:09:20,309 14444618ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:09:29,075 14453385ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:18:01,715 14966024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:18:06,372 14970681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:18:10,734 14975043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:24:27,975 15352284ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:57:36,571 17340880ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 11:59:52,605 17476914ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 12:01:30,882 17575191ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 12:39:37,555 19861865ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 12:53:56,852 20721162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 12:54:01,493 20725802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 12:54:06,056 20730365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 14:00:42,688 24726997ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:17:54,370 32958679ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:22:31,730 33236039ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:23:03,530 33267839ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:23:59,224 33323533ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:25:27,137 33411447ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:25:51,624 33435933ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:30:58,486 33742795ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:31:03,189 33747498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:31:08,346 33752655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:57:12,100 35316410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:57:17,085 35321394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 16:57:22,054 35326363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 18:00:59,439 39143748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 18:01:07,689 39151999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 18:01:15,862 39160171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:38:44,666 45008975ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:38:49,229 45013538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:38:53,963 45018272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:41:01,408 45145717ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:41:06,236 45150545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 19:41:10,893 45155202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 20:56:06,384 49650693ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:00:17,894 57102203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:00:22,253 57106562ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:00:26,629 57110938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:03:04,924 57269233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:03:09,284 57273593ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:03:13,659 57277968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:27:20,134 58724443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:27:24,588 58728897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-01 23:27:29,041 58733351ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 00:34:18,184 62742493ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 00:34:22,544 62746853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 00:34:26,951 62751260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:21:28,019 90772328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:21:34,473 90778782ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:21:43,914 90788223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:30:47,960 91332269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:30:55,054 91339363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 08:31:02,165 91346474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 09:11:44,805 93789114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 09:11:49,258 93793568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 09:11:53,665 93797975ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 10:26:32,634 98276943ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 10:27:11,885 98316194ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:19:30,851 101455160ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:20:12,621 101496930ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:20:23,576 101507885ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:21:45,707 101590016ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:21:55,130 101599439ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:24:14,173 101738482ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:45:35,059 103019368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:45:39,546 103023855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 11:45:43,966 103028275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 12:13:10,463 263221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 12:13:17,619 270377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 12:13:24,589 277347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:30:12,701 4885459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:30:17,088 4889846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:30:21,479 4894237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:31:43,894 4976652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:31:48,332 4981090ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:31:52,707 4985465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 13:46:37,851 5870609ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 14:10:05,098 7277856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 14:10:09,473 7282231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 14:10:13,820 7286578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 16:07:47,946 14340704ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 17:27:34,815 19127573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 18:22:27,627 22420386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 18:22:32,472 22425230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 18:43:54,049 23706807ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 18:43:58,439 23711197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 18:44:02,831 23715589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 19:10:29,546 25302305ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 20:43:46,416 30899174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 20:43:50,791 30903549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 20:43:57,322 30910081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 21:19:07,106 33019864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 21:19:11,528 33024286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 21:19:15,888 33028646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 22:28:27,689 37180447ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:41:24,420 41557178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:41:31,608 41564367ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:41:38,734 41571492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:43:49,136 41701895ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:43:56,418 41709176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:44:05,889 41718647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:44:19,108 41731866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:44:26,234 41738992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-02 23:44:33,313 41746071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 05:32:21,281 7392051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 06:27:34,965 10705735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 09:07:05,884 20276655ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 09:50:11,113 22861883ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-03 09:53:40,175 23070945ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 09:53:44,612 23075382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 09:53:49,050 23079820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 12:02:15,895 30786665ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 12:02:18,911 30789681ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 14:59:40,477 41431247ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:00:40,169 41490939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:01:23,533 41534303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:03:06,560 41637330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:03:18,295 41649065ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:04:02,315 41693085ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:25:05,614 42956384ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:25:12,129 42962899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 15:25:18,504 42969274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 16:43:47,455 47678225ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 16:44:56,961 47747731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:55:17,204 3472436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:55:51,423 3506656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:05,160 3520392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:31,614 3546846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:41,942 3557174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:49,989 3565221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:52,114 3567346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:56:57,848 3573081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:57:02,692 3577925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:57:27,739 3602971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:57:36,458 3611691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 20:57:44,568 3619800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:01:53,478 3868710ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:02:31,240 3906472ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:02:36,005 3911237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:02:41,130 3916362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:13:49,252 4584484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:13:54,837 4590069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:13:59,542 4594774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-03 21:42:26,245 6301478ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 08:26:33,951 44949184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 08:26:38,296 44953528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 08:26:42,655 44957887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 09:08:24,449 47459682ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 09:08:31,981 47467213ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 09:36:32,024 49147256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 09:36:36,462 49151695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 09:36:40,900 49156133ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 10:16:42,578 51557810ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 10:16:47,063 51562295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 10:16:51,486 51566718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:10:17,805 54773038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:10:22,181 54777413ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:10:26,587 54781820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:11:07,560 54822792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:11:11,934 54827167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:11:16,341 54831574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:17:17,265 55192497ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:39:57,357 56552589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:40:01,779 56557012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:40:06,171 56561403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 11:46:07,749 56922982ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 12:17:40,998 58816230ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 12:21:04,196 59019428ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 13:40:11,911 63767144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:07:48,929 65424161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:07:55,586 65430818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:08:01,445 65436678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:10:25,683 65580915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:10:30,448 65585680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:10:35,088 65590320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:21:28,457 66243690ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:29:50,926 66746158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:29:55,333 66750565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:29:59,708 66754941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 14:47:06,409 67781642ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 16:03:52,850 72388082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 16:04:00,275 72395507ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 16:04:04,961 72400193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 16:29:06,422 73901654ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 17:32:29,424 77704656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 17:32:34,065 77709297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 17:32:38,737 77713969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:37:17,857 85193089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:37:22,591 85197824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:37:27,061 85202294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:41:06,643 85421875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:41:11,144 85426376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 19:41:15,660 85430892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 20:09:17,181 87112413ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-04 20:30:52,402 88407634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 20:30:56,840 88412072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 20:31:01,340 88416573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 21:34:41,226 92236458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 21:34:45,851 92241084ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-04 21:34:50,477 92245709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:32:04,581 27235888ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:32:09,113 27240420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:32:13,441 27244748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:36:03,415 27474722ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:37:04,387 27535694ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:37:12,497 27543804ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 08:37:28,342 27559649ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 09:53:44,593 32135900ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 10:06:26,853 32898160ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 10:21:17,591 33788898ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 10:29:47,233 34298540ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:19:48,303 37299610ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:23:14,421 37505728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:23:20,905 37512212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:23:27,406 37518713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:16,457 37567764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:21,098 37572405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:25,723 37577030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:43,756 37595063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:48,366 37599673ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:24:53,241 37604549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:25:29,650 37640957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:29:51,696 37903003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:29:58,181 37909488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:30:04,666 37915973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:37:43,672 38374979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:37:50,049 38381356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:38:23,300 38414607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:38:29,769 38421076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:38:35,895 38427202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:42:34,321 38665628ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:42:50,544 38681851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:44:27,848 38779155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:45:03,492 38814799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:45:09,915 38821222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:45:16,369 38827676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:46:08,015 38879322ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:46:17,453 38888760ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:46:27,626 38898933ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:47:10,099 38941407ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:47:15,774 38947081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:49:25,706 39077013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:49:32,144 39083451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 11:57:11,986 39543293ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 12:41:36,007 42207314ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 12:41:41,492 42212799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 12:45:30,138 42441445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 12:45:34,591 42445898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 12:45:41,342 42452649ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 13:57:29,944 46761251ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:00:31,053 46942360ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:03:42,185 47133492ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:07:33,356 47364663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:07:37,731 47369038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:07:42,154 47373461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:08:10,406 47401713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:08:14,875 47406182ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:08:19,250 47410557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:21:09,611 48180918ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:21:14,235 48185542ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:21:18,876 48190183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:28:30,316 48621623ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:28:53,904 48645211ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 14:32:07,790 48839097ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:08:54,111 51045418ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:25:13,631 52024938ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:25:36,828 52048135ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:36:47,220 52718527ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:36:51,938 52723245ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 15:44:09,115 53160422ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 16:39:06,095 56457402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 16:39:10,565 56461872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 16:39:14,924 56466232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 16:41:45,240 56616547ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:20:36,763 58948070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:20:41,217 58952524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:20:45,685 58956992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:45:30,779 60442086ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:45:35,202 60446509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 17:45:39,546 60450853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:04:27,278 61578585ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:19:27,391 62478698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:19:31,906 62483213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:19:36,344 62487651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:23:32,074 62723381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:23:36,481 62727788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 18:23:40,877 62732185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 19:10:09,723 65521030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 19:13:45,730 65737037ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 19:15:29,554 65840861ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-05 22:01:19,110 75790417ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-06 09:46:29,165 13718843ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 09:46:33,634 13723313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 09:46:37,976 13727655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 10:18:12,132 15621810ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 10:18:19,694 15629373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 10:18:26,101 15635780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 10:29:12,585 16282264ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:18:12,982 19222661ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:15,964 20005643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:19,042 20008721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:22,105 20011784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:33,808 20023487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:36,872 20026551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:39,951 20029629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:45,920 20035599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:48,984 20038662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:52,046 20041725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:31:57,344 20047022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:32:00,406 20050085ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:32:03,469 20053148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:32:44,018 20093697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:32:47,081 20096760ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:32:50,159 20099838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 11:39:08,457 20478136ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-06 12:24:11,385 23181063ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-06 13:58:50,617 28860295ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 14:11:34,245 29623923ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:09:55,890 33125569ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:10:02,421 33132100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:10:08,844 33138522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:14:13,117 33382796ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:31:45,689 34435367ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:32:13,081 34462760ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:34:02,325 34572004ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 15:34:44,205 34613884ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 16:28:24,433 37834112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 17:26:39,911 41329590ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-06 17:33:05,067 41714746ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 17:33:09,521 41719200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 17:33:14,006 41723685ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 17:45:45,681 42475359ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:30:54,421 48784100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:30:59,015 48788694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:31:03,624 48793303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:49:43,345 49913024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:49:47,924 49917603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:49:52,612 49922291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:50:04,096 49933775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:50:08,661 49938340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 19:50:13,456 49943135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 20:36:25,390 52715069ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:00:03,779 54133458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:00:08,389 54138068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:00:12,921 54142599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:13:19,833 54929512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:13:24,490 54934169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:13:29,053 54938732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:30:59,783 55989461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:31:04,408 55994087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:31:09,034 55998713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:41:35,308 56624987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:41:39,683 56629362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 21:41:44,121 56633800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 23:55:24,604 64654283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 23:55:29,542 64659221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-06 23:55:34,402 64664080ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 05:52:09,886 86059565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 05:52:14,403 86064082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 05:52:18,778 86068457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:16:04,577 94694255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:16:09,030 94698709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:16:13,390 94703069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:51:33,228 96822907ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:51:54,073 96843752ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:52:46,093 96895772ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:53:09,627 96919306ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:53:40,851 96950530ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:54:23,206 96992885ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:54:46,787 97016466ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:54:47,787 97017466ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:55:12,789 97042468ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:55:25,399 97055078ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 08:55:48,464 97078143ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 09:40:40,002 99769681ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 10:02:13,166 101062845ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:06:12,670 497003ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:12:07,633 851967ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:12:12,227 856561ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:12:16,790 861123ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:14:20,911 985244ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:15:52,428 1076761ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:43:07,024 2711357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:43:13,994 2718327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:43:21,635 2725968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 11:45:29,271 2853605ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 12:17:04,388 4748721ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 13:49:30,176 10294509ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 13:59:30,676 10895009ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:01:57,762 11042095ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:07:01,088 11345422ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:10:41,358 11565691ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:12:24,789 11669122ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:24:19,714 12384047ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:26:24,196 12508529ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:32:18,599 12862932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:32:24,412 12868745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:32:28,833 12873166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:36:58,836 13143169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:37:03,461 13147794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:37:08,008 13152341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:38:09,514 13213847ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:38:15,452 13219785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:38:25,437 13229770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:52:14,557 14058890ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:54:54,041 14218374ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 14:54:58,166 14222499ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 15:14:27,117 15391451ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 15:15:10,200 15434533ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 15:16:19,049 15503383ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 15:20:23,611 15747944ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 15:51:40,221 17624554ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:24:59,433 19623766ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:25:22,163 19646496ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:25:40,696 19665029ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:36:46,350 20330684ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:36:51,133 20335466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:36:55,649 20339982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:41:07,551 20591885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:41:12,177 20596510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 16:41:16,771 20601105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:10:27,979 22352312ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:25:07,834 23232167ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:44:03,551 24367884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:44:07,990 24372323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:44:12,365 24376699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 17:59:11,267 25275601ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:37,479 25361812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:40,651 25364984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:43,792 25368125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:47,807 25372140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:50,964 25375297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:00:54,120 25378454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:02:10,206 25454539ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:03:04,398 25508731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:03:09,789 25514122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:03:12,961 25517294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:03:16,118 25520451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:04:10,154 25574487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:04:13,310 25577643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:04:16,405 25580738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:05:00,049 25624382ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:05:04,096 25628430ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:07:06,514 25750847ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:07:09,733 25754066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:07:12,920 25757253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:08:07,894 25812227ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:08:11,097 25815431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:08:14,269 25818603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:22,276 25886609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:25,463 25889797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:28,605 25892938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:45,965 25910299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:49,153 25913486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:09:52,325 25916658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:10:33,219 25957552ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:10:42,580 25966913ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:29,977 26074311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:33,181 26077514ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:39,322 26083655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:44,745 26089078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:47,885 26092219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:12:51,057 26095390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:17:45,602 26389935ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:17:48,805 26393138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:17:51,931 26396264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:13,104 26417438ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:19,308 26423642ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:22,465 26426798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:24,840 26429173ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:26,122 26430455ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:18:56,185 26460518ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:19:13,272 26477605ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:19:26,710 26491044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:19:29,852 26494185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:19:33,024 26497357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:20:48,515 26572848ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:20:59,797 26584130ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:24:07,548 26771882ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:24:44,911 26809244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:24:48,052 26812386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:24:51,193 26815526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:25:06,381 26830715ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:26:41,228 26925561ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:31:10,564 27194897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:31:13,768 27198101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:31:16,955 27201289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:31:38,722 27223055ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:33:13,340 27317673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:34:11,504 27375837ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:34:14,691 27379024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:34:17,848 27382181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:34:58,196 27422529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:35:01,336 27425669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:35:04,493 27428826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:36:22,515 27506849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:36:25,687 27510021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:36:28,834 27513168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:14,405 27558738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:17,593 27561926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:20,780 27565114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:32,612 27576945ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:40,907 27585241ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:52,205 27596539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:55,346 27599679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:37:58,471 27602805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:38:07,410 27611743ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:38:52,961 27657294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:38:56,133 27660466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:38:59,290 27663623ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:39:11,822 27676155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:39:15,010 27679343ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:39:18,182 27682515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:39:44,762 27709095ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:23,703 27748037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:26,875 27751209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:30,048 27754381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:37,517 27761850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:40,705 27765038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:40:43,846 27768179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:43:23,421 27927754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:43:26,609 27930942ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:43:29,796 27934130ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:44:01,252 27965586ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:44:06,175 27970508ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:44:13,738 27978071ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:45:53,466 28077799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:45:57,466 28081799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:48:54,747 28259081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:48:57,935 28262269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:49:01,107 28265441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:58:36,813 28841147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:58:40,408 28844741ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 18:58:43,579 28847913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:04:03,107 29167441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:04:06,295 29170628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:04:09,498 29173832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:04:36,252 29200585ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:05:03,253 29227586ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:05:54,429 29278762ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:07:17,202 29361536ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:07:26,375 29370708ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:07:29,954 29374287ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:07:33,079 29377412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:07:36,251 29380584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:08:41,865 29446198ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:09:28,072 29492406ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:09:58,303 29522636ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:10:30,393 29554726ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:11:25,523 29609856ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:11:31,539 29615873ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:11:44,290 29628624ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:11:45,634 29629968ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:12:22,028 29666361ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:13:52,974 29757307ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:14:19,117 29783450ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:14:22,992 29787326ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:14:46,932 29811265ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:14:55,886 29820219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:14:59,027 29823360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:15:02,184 29826517ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:15:11,653 29835986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:15:14,841 29839174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:15:18,013 29842346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:12,880 29897214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:16,061 29900394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:19,233 29903566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:27,280 29911613ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:30,812 29915145ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:16:49,970 29934303ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:00,299 29944632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:03,487 29947820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:06,659 29950992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:08,409 29952742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:11,613 29955946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:14,754 29959087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:36,928 29981261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:40,115 29984448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:17:43,272 29987605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:19:25,515 30089849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:19:28,687 30093020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:19:31,891 30096224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:19:55,469 30119802ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:21:38,431 30222765ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:04,809 30249142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:08,027 30252361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:11,215 30255549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:16,669 30261002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:19,857 30264190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:22,998 30267331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:30,889 30275222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:30,983 30275316ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:34,093 30278426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:37,233 30281566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:22:37,312 30281645ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:23:42,082 30346416ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:25:21,382 30445716ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:25:45,760 30470093ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:25:48,963 30473296ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:26:06,840 30491173ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:26:22,778 30507112ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:26:51,062 30535395ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:26:55,703 30540037ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:27:29,972 30574305ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:28:43,699 30648032ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:29:36,437 30700770ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:32:20,226 30864560ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:33:29,529 30933863ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:33:48,328 30952661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:36:45,499 31129832ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:40:53,158 31377492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:40:58,847 31383180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:41:04,175 31388509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:13,323 31637656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:18,573 31642906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:23,761 31648095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:31,996 31656330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:37,310 31661644ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:45:42,888 31667221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:53:33,850 32138184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:53:54,274 32158608ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 19:59:59,038 184044ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 21:13:20,466 4585472ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 21:26:16,397 5361403ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:01:00,312 7445318ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:15:30,379 8315385ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:15:33,348 8318354ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:56:40,755 10785761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:56:45,334 10790340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 22:56:50,022 10795028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 23:33:22,949 12987955ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 23:53:46,798 14211804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 23:53:51,298 14216304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-07 23:53:55,736 14220742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 08:13:54,752 44219758ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-08 09:38:32,609 49297615ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 09:38:52,001 49317007ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 09:55:16,997 50302003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 09:55:21,482 50306488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 09:55:25,858 50310864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:07:25,639 51030645ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:07:31,389 51036395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:07:35,827 51040833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:35:25,026 52710031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:35:29,448 52714454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:35:33,879 52718885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:40:24,608 53009614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:40:30,296 53015302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 10:40:34,688 53019693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 12:57:48,525 61253531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 12:57:52,838 61257844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 12:57:57,276 61262282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 13:41:06,001 63851007ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 13:43:46,787 64011793ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-08 13:52:41,641 64546647ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:01:03,138 65048144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:01:10,169 65055175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:01:17,544 65062550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:01:52,738 65097744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:02:01,442 65106448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:02:08,553 65113559ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:02:40,274 65145280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:02:47,509 65152515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 14:02:54,775 65159781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:04:20,083 68845089ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:28:20,889 70285894ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:44:51,311 71276317ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:44:53,587 71278593ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:45:27,250 71312256ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:46:44,375 71389381ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:47:52,492 71457498ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:48:44,090 71509095ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 15:49:30,370 71555376ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:23:10,132 73575138ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:25:58,649 73743655ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:26:42,825 73787831ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:27:14,015 73819021ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:29:12,481 73937487ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:30:34,145 74019151ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:31:07,667 74052673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:32:21,588 74126594ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:35:02,366 74287372ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:36:55,128 74400134ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:56:48,665 75593671ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:57:45,371 75650377ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 16:59:47,322 75772328ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 17:00:50,377 75835383ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 17:02:02,491 75907497ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:55:10,972 82695977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:55:15,269 82700275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:55:19,676 82704682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:59:16,898 82941904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:59:21,289 82946295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 18:59:25,788 82950794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 19:31:40,148 84885154ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 20:31:22,338 88467344ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 21:43:06,056 92771062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 21:43:10,540 92775546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-08 21:43:15,101 92780107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 05:50:08,406 17586474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 05:50:13,032 17591101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 05:50:17,580 17595648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 08:06:52,716 25790785ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-09 08:35:59,913 27537982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 08:36:04,305 27542373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 08:36:08,711 27546780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 08:46:15,386 28153454ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 09:22:56,461 30354529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 09:23:01,149 30359217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 09:23:05,680 30363749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 09:32:08,627 30906695ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 13:00:25,578 43403647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 13:00:30,330 43408399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 13:00:34,722 43412790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:04:09,025 50827093ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:04:14,431 50832499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:04:18,807 50836875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:28:25,916 52283985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:28:32,072 52290141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:28:38,245 52296313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:51:18,596 53656665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:51:22,966 53661035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:51:27,316 53665385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:52:02,990 53701058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:52:07,412 53705481ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 15:52:12,210 53710279ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 16:59:29,404 57747473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 16:59:33,920 57751988ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 16:59:38,314 57756382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 18:21:23,169 62661237ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 18:24:36,381 62854449ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 18:28:54,325 63112394ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 19:01:24,072 65062140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 19:01:28,495 65066564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 19:01:32,991 65071059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-09 21:12:41,141 72939209ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-09 21:12:46,515 72944583ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-09 21:42:45,733 74743801ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 10:30:30,267 16380231ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 11:11:57,665 18867630ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 11:41:58,963 20668927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 11:42:05,713 20675678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 11:42:12,151 20682116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 16:37:54,384 38424348ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 16:44:50,106 38840070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 16:44:54,499 38844463ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 16:44:58,857 38848821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 17:03:59,099 39989063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 17:04:03,693 39993657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 17:04:08,271 39998235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 18:32:12,391 45282356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 18:32:16,877 45286841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 18:32:21,236 45291201ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 19:01:25,806 47035770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 19:01:30,212 47040176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 19:01:34,649 47044613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 20:19:12,450 51702414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 20:19:17,028 51706992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 20:19:21,435 51711399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 21:17:03,285 55173249ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 21:20:13,360 55363324ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 21:20:45,660 55395624ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 21:33:19,933 56149897ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:31:01,523 59611487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:31:06,070 59616034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:31:10,617 59620581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:33:14,519 59744483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:33:19,144 59749108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-10 22:33:23,707 59753671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 04:34:24,380 81414344ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 04:34:33,835 81423799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 04:34:48,039 81438004ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 05:33:19,191 84949155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 05:33:23,567 84953531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 05:33:28,036 84958000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 06:39:03,711 88893675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 06:39:08,086 88898050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 06:39:12,493 88902457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:19:43,641 94933605ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:20:01,339 94951304ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:43:18,222 96348186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:43:24,504 96354468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:43:30,896 96360860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 08:56:54,328 97164292ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 09:15:31,788 98281752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 09:15:39,526 98289490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 09:15:46,104 98296068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 10:40:49,447 103399411ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 11:17:23,954 1198407ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 11:26:20,004 1734456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 11:26:24,425 1738877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 11:26:28,769 1743221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 12:04:33,302 4027755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 12:04:37,679 4032131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 12:04:42,071 4036523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 12:12:53,729 4528181ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 13:30:41,251 9195704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 13:30:45,799 9200252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 13:30:50,268 9204721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 14:53:41,544 14175997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 14:53:46,951 14181403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 14:53:51,357 14185810ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 15:45:18,747 17273199ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 16:03:03,857 18338309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 16:03:08,686 18343138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 16:03:13,421 18347873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 17:09:08,210 22302663ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 18:04:34,878 25629331ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 18:38:35,252 27669705ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:12:16,677 33291129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:12:23,381 33297833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:12:29,944 33304396ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:12:52,500 33326952ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:12:58,954 33333406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:13:05,517 33339969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:15:21,344 33475797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:15:27,970 33482423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 20:15:34,987 33489439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 22:05:07,152 40061604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 22:05:14,215 40068668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-11 22:05:21,731 40076184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 08:47:28,330 78602782ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 08:49:00,630 78695082ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 09:08:47,846 79882299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 09:08:57,394 79891846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 09:09:01,941 79896394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 09:27:35,687 81010139ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 09:32:48,945 81323397ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 10:19:09,251 84103704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 10:19:13,845 84108297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 10:19:18,408 84112860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 10:25:11,743 84466196ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 11:08:50,621 87085073ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 11:09:00,231 87094684ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 11:09:04,778 87099231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 11:09:09,248 87103700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 11:34:00,199 88594651ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 12:13:17,230 90951682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 12:13:22,637 90957089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 12:13:29,122 90963574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:33:06,047 99340499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:33:10,484 99344937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:33:15,923 99350375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:45:27,355 100081808ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:48:00,410 100234862ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 14:51:39,151 100453604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:01:05,779 101020231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:01:12,217 101026669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:01:19,484 101033936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:09:35,604 101530057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:09:46,262 101540714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:09:53,372 101547824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:47:45,561 103820014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:47:49,999 103824451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 15:47:54,405 103828858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:07:22,146 587394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:07:27,085 592333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:07:39,445 604693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:33:14,526 2139774ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:41:14,582 2619830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:41:19,912 2625160ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:41:32,101 2637349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:42:16,994 2682242ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:42:23,901 2689149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:42:30,386 2695634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:43:44,471 2769718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:43:56,581 2781829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:44:05,660 2790908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:44:26,459 2811707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:44:33,428 2818676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:44:40,444 2825692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:07,619 2852867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:19,510 2864758ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:24,917 2870165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:47,435 2892683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:52,482 2897730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 16:45:57,608 2902856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 18:20:21,405 8566653ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 18:58:05,836 10831084ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 20:01:55,771 14661019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 20:02:01,444 14666691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 20:02:05,897 14671145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 20:17:38,649 15603897ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:26:10,227 19715475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:26:16,134 19721382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:26:20,807 19726054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:28:31,802 19857050ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:32:18,666 20083914ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:56:50,617 21555865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:56:55,055 21560303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:56:59,446 21564694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:57:08,526 21573774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:57:11,150 21576398ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 21:57:11,650 21576898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 22:16:42,949 22748197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 22:16:47,317 22752565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-12 22:16:51,866 22757113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:08:58,159 29483407ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:09:02,690 29487938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:09:07,160 29492408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:09:39,147 29524395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:09:43,585 29528833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:09:48,008 29533255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:10:25,370 29570618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:10:29,825 29575073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 00:10:34,277 29579525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 04:00:57,265 43402513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 04:01:01,826 43407074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 04:01:06,264 43411512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 08:21:49,672 59054919ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 08:21:54,188 59059436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 08:21:58,766 59064014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 08:26:37,016 59342264ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 08:43:40,296 60365544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 09:04:02,763 61588010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 09:04:37,579 61622827ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 09:20:20,807 62566055ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 09:20:25,292 62570540ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 09:20:29,792 62575040ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 10:49:49,101 67934349ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 11:45:02,351 71247599ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 11:57:39,589 72004837ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 13:59:04,434 79289682ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 14:19:47,210 80532458ms Service                TicketRefund       - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefund(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.TicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-08-13 14:36:52,907 81558154ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 15:23:38,280 84363527ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 16:05:24,831 86870079ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 16:25:32,668 88077916ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 16:29:14,757 88300005ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 16:29:25,571 88310818ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 17:04:01,552 90386800ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 18:56:45,623 97150871ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 18:56:50,217 97155465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 18:56:54,749 97159997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 19:31:13,465 99218713ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 19:31:20,543 99225791ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 19:59:25,940 100911188ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 19:59:30,533 100915781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 19:59:35,051 100920299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:04:43,419 422259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:04:48,046 426886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:04:52,604 431444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:05:55,438 494278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:06:02,189 501028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:06:07,361 506201ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 21:34:37,470 2216310ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-13 22:06:50,204 4149044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 22:06:54,595 4153435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-13 22:06:59,063 4157903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:12:32,179 29691019ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:12:51,305 29710145ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:15:35,632 29874471ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:15:48,164 29887004ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:16:02,666 29901505ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:17:50,253 30009093ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:18:53,523 30072362ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:26:44,980 30543820ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:26:53,873 30552713ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 05:27:29,109 30587949ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 08:36:23,137 41921977ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 08:36:43,765 41942605ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 08:37:42,879 42001718ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 08:39:13,569 42092409ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 09:12:59,792 44118631ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 09:50:00,899 46339739ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:23:45,392 48364232ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:41:10,435 49409275ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:45:14,268 49653108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:46:18,230 49717069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:46:42,308 49741148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:46:57,310 49756149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:47:10,484 49769324ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:47:38,532 49797372ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:48:09,208 49828048ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:48:22,380 49841220ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:48:25,333 49844173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:50:22,358 49961198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:50:59,754 49998594ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:51:12,895 50011735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:56:02,284 50301124ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:58:36,142 50454982ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 10:59:26,631 50505471ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:00:11,744 50550584ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:00:12,556 50551396ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:00:25,137 50563976ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:01:15,019 50613859ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:07:59,510 51018350ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:25,799 51164639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:28,924 51167763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:32,033 51170873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:39,706 51178546ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:53,910 51192750ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:10:56,988 51195828ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:11:00,099 51198939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:11:20,367 51219207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:11:23,444 51222284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:11:26,523 51225363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:23:39,584 51958424ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:26:36,466 52135306ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:30:11,266 52350106ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 11:30:28,611 52367450ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:36:26,017 56324856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:36:30,454 56329294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:36:34,877 56333716ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:37:42,539 56401379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:37:47,133 56405973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 12:37:51,727 56410567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:36:44,731 63543571ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:37:31,187 63590027ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:40:48,600 63787440ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:41:26,311 63825151ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:50:49,249 64388089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:50:54,984 64393824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:50:59,312 64398151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:51:06,531 64405370ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 14:56:15,730 64714570ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 15:37:41,448 67200288ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:01:24,516 68623356ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:25:08,524 70047364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:25:13,008 70051848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:25:17,400 70056240ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:32:38,765 70497605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:32:45,234 70504074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 16:32:52,250 70511090ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:16:20,519 73119359ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:17:20,610 73179450ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:17:25,003 73183842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:17:29,501 73188341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:18:29,617 73248457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:18:33,961 73252801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:18:38,336 73257176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:20:43,223 73382063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:20:47,598 73386438ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:20:51,972 73390812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:22:16,122 73474962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:22:20,529 73479369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:22:25,138 73483978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:39:09,497 74488337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:39:13,982 74492822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 17:39:18,312 74497152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 18:22:26,461 77085301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 18:22:30,836 77089676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 18:22:35,180 77094020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 20:15:36,743 83875583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 20:15:41,949 83880788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 20:15:47,277 83886117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 21:10:47,420 87186260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 21:10:54,124 87192963ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 21:10:59,374 87198214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:10:15,227 90754066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:10:19,790 90758630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:10:24,338 90763178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:31:12,629 92011468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:31:17,035 92015875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:31:21,441 92020281ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:39:45,333 92524173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:39:49,724 92528564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:39:54,100 92532940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:48:06,595 93025435ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:52:08,968 93267808ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:52:13,328 93272168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:52:17,750 93276590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:04,199 93563039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:08,809 93567649ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:13,385 93572225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:48,373 93607213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:53,218 93612058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 22:57:57,796 93616636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:39:20,443 96099283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:39:25,006 96103846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:39:29,631 96108471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:40:07,869 96146709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:40:12,478 96151318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-14 23:40:17,025 96155865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:53:53,533 100572372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:53:57,892 100576732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:54:02,314 100581154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:58:23,900 100842740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:58:28,338 100847178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 00:58:32,886 100851726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:29:53,784 23472699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:29:58,174 23477089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:30:02,534 23481449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:51:02,241 24741156ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:51:07,913 24746828ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:51:26,431 24765345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 08:51:31,838 24770753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:25:54,728 26833643ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:39:34,854 27653769ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:56:55,965 28694879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:57:00,402 28699317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:57:04,793 28703708ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:59:52,391 28871306ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 09:59:55,799 28874714ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 10:27:52,105 30551019ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 10:52:40,389 32039303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 10:53:41,941 32100856ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 11:12:59,362 33258277ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 11:14:32,495 33351410ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 11:30:36,975 34315890ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 14:28:08,156 44967071ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 14:54:00,718 46519632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 14:54:07,530 46526445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 14:54:14,016 46532931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:38:32,241 49191156ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:54:19,502 50138417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:54:23,971 50142886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:54:28,362 50147277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:55:49,245 50228159ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 15:56:00,434 50239348ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 16:10:59,526 51138441ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-15 16:24:03,197 51922112ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:21:57,571 62596486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:22:01,978 62600893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:22:06,323 62605237ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:59:43,160 64862075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:59:47,552 64866467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 19:59:52,006 64870920ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 20:05:33,973 65212887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 20:05:38,442 65217357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 20:05:42,770 65221685ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 21:54:07,588 71726503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 21:54:12,058 71730972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 21:54:16,479 71735394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 22:01:19,919 72158834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 22:01:24,387 72163302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-15 22:01:28,826 72167741ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 09:51:18,044 10397315ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 09:52:20,409 10459680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 09:52:24,737 10464008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 09:52:29,050 10468321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:41:08,956 13388227ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:46:04,646 13683917ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:47:22,371 13761642ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:49:20,883 13880154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:54:40,075 14199347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:54:45,013 14204284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 10:54:49,356 14208627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:12:19,685 18858956ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:16:06,375 19085646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:16:13,563 19092834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:16:20,594 19099865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:19:43,096 19302367ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:19:52,434 19311705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 12:19:59,761 19319032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 14:30:55,969 27175241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 14:31:00,486 27179757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 14:31:04,924 27184195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 15:03:00,491 29099762ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 15:57:51,858 32391129ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 16:31:29,799 34409070ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 16:54:28,103 35787375ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:08:33,083 36632354ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:08:39,412 36638683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:08:45,817 36645088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:10:40,334 36759605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:10:46,756 36766027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:10:53,179 36772450ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:15:32,128 37051399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:15:38,566 37057837ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 17:15:44,972 37064244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 19:15:33,158 44252429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 19:15:38,768 44258039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 19:15:43,565 44262836ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 20:08:49,533 47448804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 20:08:54,112 47453383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-16 20:08:58,753 47458024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:02:00,395 90239666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:02:09,630 90248902ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:02:17,944 90257215ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:16:01,505 91080776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:16:13,678 91092949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 08:16:22,100 91101371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 09:15:29,149 94648420ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 09:18:46,148 94845419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 09:18:52,913 94852184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 09:18:57,272 94856543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 09:50:29,750 96749021ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-17 10:54:40,683 100599954ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-17 13:17:16,559 4746400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 13:17:20,950 4750790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 13:17:25,278 4755119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 13:41:06,853 6176694ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 13:55:29,361 7039202ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 14:26:16,546 8886387ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 17:26:43,778 19713619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 17:26:48,341 19718182ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 17:26:52,857 19722697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 20:21:58,338 30228179ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-17 20:52:32,126 32061967ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 20:52:38,796 32068637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 20:52:47,000 32076841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 21:00:56,666 32566507ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:03:40,535 36330375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:03:45,004 36334845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:03:49,442 36339283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:36:10,198 38280039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:36:14,824 38284665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-17 22:36:19,262 38289103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 05:54:38,181 64588022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 05:54:42,636 64592477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 05:54:47,027 64596868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:02:06,113 65035953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:02:10,519 65040360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:02:14,911 65044752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:13:02,110 65691951ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:13:08,516 65698357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:13:14,829 65704670ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:14:31,351 65781192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:14:37,790 65787631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 06:14:44,165 65794005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 07:08:01,353 68991193ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:39:51,548 74501388ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:44:49,423 74799264ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:48:27,100 75016940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:48:32,600 75022441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:48:37,069 75026910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:50:46,980 75156821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:50:51,403 75161244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:50:55,809 75165650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:53:13,556 75303397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:53:17,962 75307803ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 08:53:22,353 75312194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 09:26:54,543 77324384ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 09:26:58,997 77328838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 09:27:03,375 77333216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 09:29:45,476 77495317ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 09:51:40,200 78810041ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-18 10:01:35,128 79404969ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-18 10:12:36,115 80065955ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 10:57:23,059 82752900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 10:57:29,607 82759448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 10:57:36,672 82766513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 11:28:00,685 84590525ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 12:32:33,120 88462961ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 12:54:36,989 89786830ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-18 14:15:33,431 94643272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 14:15:39,932 94649772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 14:15:44,303 94654143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 15:27:51,365 98981206ms Service                MoveNext           - Running time: 24-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-08-18 15:32:13,546 99243387ms Service                MoveNext           - Running time: 23-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-08-18 15:37:16,497 99546338ms Service                MoveNext           - Running time: 23-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-08-18 15:40:31,687 99741527ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:07:11,382 101341223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:07:15,851 101345692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:07:20,711 101350552ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:09:47,223 101497064ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:09:51,755 101501596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 16:09:57,130 101506971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 17:28:59,207 1839508ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 17:29:01,614 1841915ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 18:04:30,828 3971129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 18:04:35,468 3975769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 18:04:40,109 3980410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:34:34,052 9374353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:34:38,553 9378853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:34:42,881 9383182ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:37:31,885 9552186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:37:36,337 9556638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:37:40,713 9561013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:39:01,157 9641458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:39:05,628 9645928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 19:39:09,986 9650286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 20:07:32,356 11352657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 20:07:36,841 11357142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 20:07:41,310 11361610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 21:20:00,386 15700687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 21:20:04,855 15705156ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 21:20:09,309 15709609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 22:21:26,828 19387128ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 22:21:33,250 19393551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 22:21:39,672 19399973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-18 22:34:00,575 20140876ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:33:36,319 56116619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:33:40,772 56121073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:33:45,179 56125480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:35:17,951 56218252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:35:22,565 56222866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:35:26,923 56227224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:39:09,889 56450189ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:39:16,625 56456926ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 08:53:12,540 57292841ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 09:47:51,319 60571620ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 10:07:16,264 61736565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 10:07:21,390 61741691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 10:07:25,797 61746097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 10:30:59,759 63160060ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 10:31:13,924 63174225ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 11:14:20,621 65760922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 11:14:25,153 65765454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 11:14:29,607 65769907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 13:24:37,902 73578203ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 14:10:51,936 76352236ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 14:25:29,575 77229876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 14:25:34,013 77234314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 14:25:38,420 77238720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 14:59:50,677 79290977ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 15:24:25,065 80765366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 15:24:32,425 80772726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 15:24:38,878 80779179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 15:34:34,338 81374639ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 16:16:31,746 83892047ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 16:37:02,253 85122553ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:23:31,482 91511783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:23:38,030 91518330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:23:44,484 91524785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:26:59,938 91720239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:27:06,330 91726631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 18:27:12,916 91733216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 20:25:02,127 98802428ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 21:56:55,171 104315472ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 22:23:11,271 1475231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 22:23:15,818 1479778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-19 22:23:20,272 1484232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 06:34:47,980 30971940ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 06:52:35,734 32039694ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 08:01:44,945 36188905ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 08:02:29,889 36233849ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 09:08:20,617 40184577ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 09:37:27,604 41931564ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 10:35:26,726 45410686ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 10:37:37,593 45541553ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:04:52,004 47175963ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:05:04,693 47188652ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:12:07,946 47611905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:12:12,665 47616624ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:12:17,274 47621234ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:15:01,869 47785829ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 11:39:31,991 49255951ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:08:34,658 50998618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:08:41,971 51005931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:08:49,083 51013043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:10:19,168 51103127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:10:26,543 51110503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:10:34,013 51117972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:11:55,200 51199159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:12:03,873 51207833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 12:12:14,170 51218130ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 13:15:33,978 55017937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 13:15:38,384 55022344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 13:15:42,775 55026735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 13:59:13,049 57637009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:01:21,921 57765881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:01:27,765 57771725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:03:10,819 57874779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:05:06,163 57990122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:06:37,170 58081130ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:07:03,193 58107153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:07:19,350 58123310ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:08:20,215 58184175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:08:46,264 58210224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:09:02,390 58226350ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:09:21,789 58245749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:10:45,414 58329374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:11:41,325 58385285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:13:20,098 58484058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:14:45,496 58569456ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:15:03,139 58587098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:16:21,317 58665277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:17:47,107 58751067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 14:18:04,343 58768303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 15:32:22,044 63226003ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 15:43:35,985 63899944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 15:43:40,411 63904371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 15:43:44,833 63908793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 16:06:28,694 65272654ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 16:06:34,804 65278764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 16:06:39,929 65283889ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 16:26:40,624 66484584ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 17:22:14,344 69818304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 17:22:21,688 69825647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 17:22:28,079 69832039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 18:20:42,816 73326776ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 18:31:20,499 73964458ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:18:25,204 76789163ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:25:40,455 77224415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:25:44,878 77228837ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:25:49,237 77233197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:50:40,680 78724640ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:54:36,192 78960152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:54:42,956 78966916ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 19:54:49,442 78973402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:02:46,515 86650474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:02:50,953 86654913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:02:55,359 86659319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:22:25,772 87829732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:22:30,397 87834357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:22:34,960 87838920ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-20 22:48:40,987 89404947ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 06:25:29,802 12301029ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 07:33:59,965 16411192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 07:34:07,028 16418255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 07:34:13,451 16424678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 08:36:22,583 20153810ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 08:36:27,100 20158326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 08:36:31,521 20162748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:27:24,571 23215797ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:35:27,272 23698498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:35:33,694 23704921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:35:41,960 23713187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:36:11,652 23742879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:36:18,121 23749348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 09:36:24,466 23755693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 10:00:43,222 25214449ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 11:11:21,919 29453146ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 12:11:49,542 33080769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 12:11:54,043 33085270ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 12:11:58,356 33089583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 13:08:58,921 36510148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 13:09:05,406 36516632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 13:09:12,984 36524211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 14:57:01,144 42992371ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 15:30:18,555 44989781ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 15:32:35,488 45126715ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 15:53:50,302 46401529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 15:53:54,819 46406046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 15:54:00,975 46412202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:02:11,819 46903046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:02:16,398 46907625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:02:20,993 46912220ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:15:19,422 47690649ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:25:36,243 48307470ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:29:43,109 48554336ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:54:33,113 50044339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:54:39,628 50050855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 16:54:46,019 50057246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 17:22:33,507 51724734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:06:23,754 54354980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:06:28,410 54359637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:06:32,770 54363997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:08:22,874 54474101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:08:27,218 54478445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 18:08:31,594 54482821ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 19:13:52,657 58403884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 19:13:57,251 58408478ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 19:14:01,878 58413105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 19:55:02,375 60873602ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 21:14:18,183 65629410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 21:14:23,543 65634770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 21:14:29,465 65640692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-21 22:52:03,652 71494879ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-21 23:35:07,408 74078634ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 00:05:19,518 75890745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 00:05:23,970 75895197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 00:05:28,408 75899634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 06:24:57,909 98669136ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 07:35:30,694 102901920ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 07:53:25,053 103976280ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:00:45,945 3713997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:00:53,100 3721152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:01:00,164 3728216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:03:40,167 3888219ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:50:52,685 6720737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:50:57,123 6725174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:51:02,232 6730284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 09:55:20,093 6988144ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:38:43,152 9591203ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:39:34,609 9642661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:39:41,703 9649755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:39:48,940 9656992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:45:01,787 9969839ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 10:56:00,888 10628940ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 11:01:39,312 10967363ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 11:14:40,932 11748984ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:10:59,965 15128017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:11:04,605 15132656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:11:09,152 15137204ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:11:30,303 15158355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:11:34,881 15162933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 12:11:39,538 15167590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:15:42,219 19010271ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:16:54,959 19083011ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:43:43,831 20691883ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:45:58,834 20826886ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:47:08,293 20896345ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:52:44,463 21232515ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:52:51,326 21239378ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:57:33,631 21521682ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 13:59:55,647 21663699ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:07:29,803 25717855ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:08:13,464 25761516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:11:07,255 25935307ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:17:50,217 26338269ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:18:23,518 26371569ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:19:57,010 26465062ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:57:09,707 28697759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:57:14,098 28702150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 15:57:18,459 28706511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 16:08:22,530 29370582ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 16:09:24,018 29432069ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 16:15:27,076 29795127ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 16:58:32,064 32380116ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 17:01:22,787 32550839ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 17:26:50,570 34078622ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 17:52:28,083 35616134ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-22 18:25:20,936 37588988ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 18:53:28,114 39276166ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 19:45:10,474 42378526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 19:45:14,833 42382885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 19:45:20,539 42388590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 22:47:14,574 53302626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 22:47:19,090 53307142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 22:47:23,497 53311549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 23:02:00,346 54188398ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-22 23:28:56,350 55804402ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-23 02:13:48,122 65696174ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 09:27:09,883 91697935ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 09:50:02,544 93070596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 09:50:06,937 93074989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 09:50:11,295 93079347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:09:36,227 94244279ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:09:40,617 94248669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:09:44,946 94252997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:11:30,158 94358210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:31:00,620 95528672ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:39:11,224 96019276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:39:15,646 96023698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:39:20,037 96028089ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 10:56:54,004 97082056ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 11:12:08,314 97996366ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-23 11:41:39,704 99767756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 11:41:44,251 99772303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 11:41:48,830 99776882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 12:03:09,590 101057641ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 12:03:17,762 101065814ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 12:03:24,200 101072252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 13:35:39,668 1431251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 13:35:44,215 1435798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 13:35:48,590 1440173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 14:57:12,608 6324191ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 14:57:17,374 6328957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 14:57:21,688 6333271ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 15:05:57,241 6848824ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 15:41:20,551 8972134ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-23 19:51:41,434 23993016ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 20:39:32,296 26863879ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 20:39:41,312 26872895ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 21:06:54,176 28505759ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 22:24:27,283 33158866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 22:24:31,894 33163477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-23 22:24:36,473 33168056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 07:49:09,106 67040689ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 09:51:00,165 74351748ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-24 10:02:59,794 75071376ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:32:53,208 87664791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:33:09,320 87680903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:33:27,604 87699186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:34:22,091 87753674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:34:28,374 87759957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 13:34:36,827 87768410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 14:56:24,679 92676261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 14:56:29,116 92680699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 14:56:33,492 92685075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 16:01:17,105 96568688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 16:01:23,246 96574829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 16:01:27,997 96579580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 16:11:25,751 97177334ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-24 16:11:36,879 97188462ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-24 21:07:02,292 10507941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 21:07:07,105 10512754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-24 21:07:12,231 10517879ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 08:11:00,460 50346108ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 08:11:33,253 50378901ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 08:37:22,810 51928458ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 14:56:43,294 74688942ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:09:00,572 75426221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:09:05,213 75430861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:09:09,824 75435472ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:35:31,233 77016882ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:35:49,110 77034758ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:36:42,382 77088030ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:39:00,988 77226636ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:39:16,536 77242184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 15:39:32,517 77258165ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:26:39,182 80084830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:26:47,620 80093268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:26:54,996 80100644ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:32:50,829 80456478ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:32:55,331 80460980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 16:33:00,033 80465682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 17:10:31,836 82717484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 17:10:36,180 82721828ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 17:10:41,713 82727361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 18:37:59,989 87965637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 18:38:04,973 87970621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 18:38:09,676 87975325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 20:05:49,183 93234832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 20:05:53,949 93239598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 20:05:58,434 93244083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-25 21:09:13,902 97039550ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-25 21:09:33,904 97059552ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 06:45:38,781 27215098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 06:45:43,485 27219802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 06:45:48,048 27224365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 09:32:19,606 37215923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 09:32:26,077 37222395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 09:32:32,564 37228881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 10:32:49,464 40845782ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 10:32:54,229 40850546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 10:32:58,682 40855000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 10:44:55,027 41571344ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 10:46:14,331 41650648ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:17:55,203 43551521ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:18:01,095 43557412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:18:05,643 43561960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:18:14,460 43570778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:18:18,992 43575310ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 11:18:23,647 43579965ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 12:35:43,802 48220120ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 13:50:46,775 52723092ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 13:50:51,181 52727498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 13:50:55,589 52731906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 14:21:28,857 54565174ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 14:43:14,092 55870409ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 14:46:05,701 56042019ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 14:58:36,343 56792660ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:00:26,563 56902880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:00:30,938 56907255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:00:35,344 56911661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:42:58,438 59454755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:43:02,860 59459178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 15:43:07,281 59463599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 16:30:44,804 62321121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 16:30:51,726 62328043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 16:30:59,439 62335756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 17:36:43,436 66279753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 17:36:47,797 66284115ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 17:36:52,173 66288490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 18:10:27,952 68304269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 18:10:32,312 68308629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 18:10:36,764 68313081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 19:16:01,794 72238111ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 20:16:33,361 75869678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 20:16:38,518 75874835ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 20:16:43,019 75879336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:25:10,523 79986840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:25:15,442 79991759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:25:20,043 79996360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:27:22,022 80118339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:27:26,522 80122840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-26 21:27:31,023 80127341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 05:40:33,865 5272243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 05:40:38,272 5276650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 05:40:42,694 5281072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 06:35:36,886 8575264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 06:35:41,214 8579592ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 06:35:45,527 8583905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 08:29:10,409 15388787ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 08:34:44,950 15723328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 08:34:49,296 15727674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 08:34:53,639 15732017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 11:02:25,365 24583743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 11:02:29,881 24588259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 11:02:34,318 24592696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 11:49:39,238 27417616ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 13:34:14,856 33693235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 13:34:19,279 33697657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 13:34:23,654 33702032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:28:58,518 44176896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:29:04,833 44183212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:29:11,604 44189982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:29:36,726 44215104ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:29:43,121 44221499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 16:29:49,668 44228046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 17:51:01,462 49099840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 17:51:05,900 49104278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 17:51:10,260 49108638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 18:27:25,104 51283482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 18:27:29,494 51287872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 18:27:33,854 51292232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 20:15:35,620 57773998ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-27 23:07:16,925 68075303ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 06:05:50,927 93189305ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 08:22:35,511 101393889ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 08:22:42,261 101400639ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 08:24:14,269 101492647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 08:24:20,521 101498899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 08:24:26,756 101505134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 09:29:18,771 1016195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 09:29:23,349 1020773ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 09:29:27,927 1025352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 10:05:50,106 3207530ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 10:05:56,044 3213468ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 10:16:04,209 3821634ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 11:46:36,648 9254072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 11:46:44,758 9262183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 11:46:51,852 9269277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 13:34:49,236 15746660ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 13:34:53,687 15751111ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 13:34:58,125 15755549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 13:54:45,397 16942821ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 14:07:34,461 17711885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 14:07:38,852 17716276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 14:07:43,258 17720683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 15:09:03,747 21401172ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:01:52,386 24569811ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:08:24,898 24962322ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:08:34,226 24971651ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:08:55,603 24993028ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:09:03,168 25000592ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:09:16,949 25014373ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:09:28,434 25025859ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:09:46,842 25044267ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:11:07,324 25124748ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:12:13,988 25191412ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:12:28,630 25206054ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:12:45,022 25222446ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:14:09,328 25306752ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:15:26,974 25384398ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:15:34,521 25391946ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:15:43,694 25401119ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:15:57,055 25414479ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:16:58,058 25475482ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:26:12,491 26029915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:26:16,976 26034400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:26:21,599 26039023ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:41:27,408 26944833ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:49:11,137 27408561ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 16:50:55,021 27512446ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:08:10,836 28548260ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:22:27,010 29404434ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:22:31,602 29409026ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:22:36,119 29413543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:31:13,734 29931159ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 17:37:15,203 30292628ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-28 18:38:26,765 33964189ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 18:38:47,424 33984849ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 18:56:40,079 35057503ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 19:23:21,951 36659376ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 19:29:56,959 37054383ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 21:10:30,085 43087509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 21:10:34,695 43092119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 21:10:39,697 43097121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-28 21:25:21,037 43978461ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 09:41:38,102 88155526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 09:41:44,681 88162106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 09:41:51,151 88168575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 11:02:39,182 93016606ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-29 11:46:34,288 95651712ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 12:16:05,645 97423069ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-29 12:17:53,077 97530502ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-29 13:34:28,828 102126253ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 13:39:38,386 102435810ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 13:39:54,576 102452001ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:01:32,854 103750279ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:20:09,942 457767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:20:14,395 462220ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:20:18,739 466564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:21:14,973 522798ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:21:17,692 525517ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:22:33,367 601192ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:58:10,546 2738371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:58:15,156 2742981ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 14:58:19,751 2747576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:16:08,146 3815971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:16:12,537 3820362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:16:16,927 3824752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:50:12,543 5860368ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:50:17,139 5864964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:50:21,530 5869355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:51:49,358 5957183ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:52:44,076 6011901ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:54:10,129 6097954ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:58:40,464 6368289ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 15:58:58,735 6386560ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:00:17,583 6465408ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:06:10,554 6818379ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:07:43,733 6911558ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:11:52,069 7159894ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:15:03,057 7350882ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:16:26,329 7434154ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:25:21,906 7969731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:26:13,501 8021326ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:30:32,051 8279876ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:31:30,103 8337928ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:32:25,623 8393448ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:32:59,565 8427390ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:34:51,245 8539070ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:36:27,878 8635703ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:37:14,762 8682587ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:38:33,569 8761394ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:39:15,335 8803160ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:41:10,924 8918749ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:43:43,984 9071809ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:44:53,647 9141472ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:47:57,773 9325598ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 16:59:15,109 10002934ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:21:45,796 11353621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:21:50,171 11357996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:21:54,531 11362356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:22,429 11450254ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:26,820 11454645ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:31,196 11459021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:38,806 11466631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:43,244 11471069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 17:23:47,650 11475475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 20:58:42,899 24370724ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 21:16:27,464 25435290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 21:16:31,949 25439774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-29 21:16:36,965 25444791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 00:02:06,349 35374174ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 00:05:18,276 35566101ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 09:54:07,344 70895169ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:36:44,065 73451890ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:48:30,176 74158001ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:48:46,476 74174301ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:49:47,653 74235478ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:50:09,216 74257041ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:50:53,705 74301530ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 10:56:45,312 74653137ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 11:01:41,614 74949439ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 12:41:23,178 80931003ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 16:02:02,073 92969898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 16:02:06,714 92974539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-30 16:02:11,433 92979258ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 08:06:09,109 46400459ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 08:06:28,219 46419568ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:03:51,928 60663278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:03:58,384 60669733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:04:04,679 60676029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:04:22,087 60693437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:04:28,338 60699687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:04:34,651 60706001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:05:05,796 60737145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:05:13,234 60744583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 12:05:20,561 60751911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 15:11:27,021 71918370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 15:11:31,412 71922762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 15:11:35,789 71927139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 17:31:16,788 80308138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 17:31:21,431 80312781ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 17:31:25,994 80317343ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 20:54:51,945 92523294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 20:54:56,447 92527796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-08-31 20:55:00,883 92532232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:22:51,138 32989010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:22:55,655 32993526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:22:59,983 32997855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:24:18,350 33076221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:24:22,678 33080549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:24:27,522 33085393ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:43:21,758 34219629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:43:26,321 34224192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 09:43:30,899 34228770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 10:09:11,567 35769439ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 15:19:45,571 54403442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 15:19:50,034 54407905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 15:19:54,597 54412468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 16:21:33,414 58111286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 16:21:37,947 58115818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 16:21:42,462 58120333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-01 16:46:31,127 59608999ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 09:59:48,458 17133930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 09:59:52,927 17138399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 09:59:57,256 17142728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:52:56,011 31121483ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:53:03,215 31128686ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:53:10,512 31135984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:54:26,003 31211475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:54:33,113 31218585ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 13:54:40,240 31225712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 14:46:39,404 34344875ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:18:46,269 65071740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:18:50,722 65076194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:18:55,254 65080726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:25:11,532 65457004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:25:16,126 65461598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-02 23:25:20,658 65466130ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 09:31:30,306 101835778ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 11:28:13,711 4503106ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 11:41:10,218 5279613ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 11:41:18,797 5288192ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 11:45:02,453 5511848ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 11:47:34,673 5664068ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 12:52:35,625 9565020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 12:52:40,079 9569474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 12:52:44,450 9573845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 12:59:34,819 9984214ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 13:00:47,075 10056470ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 13:01:27,011 10096406ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 14:03:18,146 13807541ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 18:45:49,231 30758626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 18:45:55,699 30765094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 18:46:02,325 30771720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 18:48:47,050 30936445ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 18:49:11,181 30960576ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-03 19:08:50,992 32140387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 19:08:55,446 32144841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 19:08:59,790 32149185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 21:45:46,469 41555864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 21:45:52,891 41562286ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 21:45:59,407 41568802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-03 23:07:40,258 46469653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 06:45:42,531 73951926ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 06:45:47,594 73956989ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 07:55:26,063 78135458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 07:55:30,532 78139927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 07:55:36,220 78145615ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 08:18:25,918 79515313ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 08:18:34,028 79523423ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 10:20:26,121 2896984ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 10:39:15,779 4026642ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:07,360 5458223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:11,766 5462629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:16,204 5467067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:47,050 5497913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:51,442 5502305ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:03:55,817 5506680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:31:07,795 7138658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:31:12,311 7143174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 11:31:16,702 7147565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:24:54,294 13965157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:25:01,371 13972234ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:25:08,700 13979563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:33:28,189 14479052ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:38:24,532 14775395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:38:31,705 14782568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:38:39,252 14790115ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:46:42,366 15273229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:46:46,929 15277792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:46:51,461 15282324ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 13:53:23,019 15673882ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 14:36:52,303 18283166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 14:36:56,694 18287557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 14:37:01,086 18291949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 14:52:01,191 19192054ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 15:00:46,770 19717633ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 15:55:08,074 2506552ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 15:55:15,308 2513786ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 15:55:22,943 2521421ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 16:09:36,107 3374585ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 16:15:40,438 3738916ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 16:15:45,375 3743853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 16:15:49,859 3748337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 16:30:44,429 4642907ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:04:49,827 6688305ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:34:14,341 8452819ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:34:18,700 8457178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:34:23,123 8461601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:53:06,218 9584696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:53:11,921 9590399ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 17:53:16,484 9594962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 18:50:32,124 13030602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 18:50:36,625 13035103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 18:50:41,124 13039602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 21:46:13,800 23572278ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-04 21:55:00,080 24098558ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 21:56:01,977 24160455ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-04 22:44:01,074 27039552ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:28:31,779 62110257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:28:38,154 62116632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:28:44,450 62122928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:55:29,284 63727762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:55:33,847 63732325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:55:38,378 63736856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:55:46,771 63745249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:56:12,319 63770797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 08:56:16,851 63775329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 09:53:15,529 67194007ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 11:17:02,670 72221148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 11:17:07,077 72225555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 11:17:11,419 72229897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 12:15:59,980 75758458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 12:16:04,434 75762912ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 12:16:08,856 75767334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:43:52,770 81031248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:43:57,380 81035858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:44:01,957 81040435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:45:59,953 81158431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:46:04,532 81163010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:46:09,109 81167587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:50:16,798 81415276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:50:21,455 81419933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 13:50:26,064 81424542ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 14:42:55,520 84573998ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:05:10,687 85909165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:05:17,904 85916382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:05:25,079 85923557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:28:03,805 87282283ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:39:59,837 87998315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:40:04,257 88002735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:40:08,683 88007161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 15:53:50,100 88828578ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:19:27,399 90365877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:19:33,165 90371643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:19:39,010 90377488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:22:41,510 90559988ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:46:22,388 91980866ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:52:46,835 92365313ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-05 16:54:54,624 92493102ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:01:39,203 92897681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:01:43,625 92902103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:01:47,985 92906463ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:30:19,430 94617908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:30:23,852 94622330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:30:28,212 94626690ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:49:38,795 95777273ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:49:45,905 95784383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 17:49:53,063 95791541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 18:25:17,544 97916022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 18:25:21,951 97920429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 18:25:26,326 97924804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 19:59:47,106 103585584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 19:59:51,856 103590334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 19:59:56,434 103594912ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 20:55:44,878 2535049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 20:55:49,487 2539657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 20:55:53,971 2544142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:32:19,270 4729441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:32:23,788 4733959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:32:28,304 4738475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:36:47,251 4997422ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:36:51,642 5001813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:36:55,970 5006141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:38:01,492 5071663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:38:05,866 5076037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 21:38:10,210 5080381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 22:23:12,450 7782620ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 22:23:18,904 7789074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-05 22:23:25,278 7795448ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 08:29:58,003 44188174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 08:30:02,347 44192518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 08:30:07,144 44197315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:12:58,467 53968638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:13:02,937 53973108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:13:07,374 53977545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:13:57,849 54028020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:14:02,396 54032567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:14:06,911 54037082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:30:59,528 55049699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:31:04,084 55054255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 11:31:08,618 55058789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 13:10:04,552 60994723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 13:10:09,190 60999361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 13:10:13,754 61003925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 13:47:10,468 63220639ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 13:50:22,939 63413110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 14:35:42,473 66132644ms Service                MoveNext           - Running time: 44-System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Rest.Controller.GenerateErrorMessage(String url, BaseRes response)
   at VietnamAirlines.Api.Rest.Controller.<BookFlight>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-09-06 15:15:04,487 68494657ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:10:11,385 71801556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:10:15,995 71806166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:10:20,697 71810868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:11:01,108 71851278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:11:06,094 71856264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:11:10,672 71860843ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:33:53,986 73224157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:54:17,900 74448071ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 16:54:45,745 74475916ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 17:04:52,563 75082734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:15:15,442 79305612ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:15:19,848 79310019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:15:24,629 79314800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:18:57,211 79527382ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:19:01,805 79531976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:19:06,416 79536587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:30:51,647 80241817ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:58:37,943 81908114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:58:42,468 81912639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 18:58:47,053 81917224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 20:19:41,039 86771210ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-06 21:04:19,132 89449303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 21:04:23,632 89453802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 21:04:28,085 89458256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-06 21:49:57,134 92187305ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 02:41:38,317 5268323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 02:41:42,942 5272947ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 02:41:47,302 5277307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 04:19:21,374 11131380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 07:07:24,384 21214389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 07:07:28,790 21218796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 07:07:33,197 21223203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 08:27:35,030 26025035ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-07 08:28:25,144 26075149ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-07 08:28:36,039 26086045ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-07 11:33:12,058 37162063ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:39:14,377 44724383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:40:46,625 44816630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:40:53,063 44823068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:41:03,141 44833146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:41:09,642 44839648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:41:16,034 44846039ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 13:48:00,148 45250153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:13:15,626 46765631ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:30:05,658 47775663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:30:13,090 47783095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:30:17,481 47787486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:33:51,068 48001073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:33:55,443 48005449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:34:09,367 48019372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:39:37,192 48347197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:39:41,660 48351665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:39:46,129 48356134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:52:24,740 49114745ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:52:29,303 49119308ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 14:52:33,836 49123841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 17:13:01,287 57551292ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-07 17:45:28,271 59498277ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 17:46:10,636 59540641ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 17:46:29,994 59560000ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 21:49:39,842 74149847ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-07 22:30:58,655 76628661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 22:31:03,187 76633193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-07 22:31:07,657 76637662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 07:29:25,974 4529255ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 07:51:36,715 5859996ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:18:58,325 7501606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:20:41,425 7604706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:22:24,512 7707793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:22:56,922 7740203ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:23:14,344 7757625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:23:26,283 7769564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 08:52:59,693 9542974ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 10:24:28,640 15031921ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 10:43:34,190 16177471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 10:43:38,617 16181899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 10:43:43,052 16186333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 10:52:23,987 16707268ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 11:31:12,613 19035895ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 11:31:17,035 19040316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 11:31:21,473 19044754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:12:51,778 21535060ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:17:55,373 21838654ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:17:59,748 21843029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:18:04,139 21847420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:51:09,399 23832680ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 12:51:53,074 23876356ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 13:02:58,641 24541922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 13:03:03,046 24546328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 13:03:07,468 24550749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 13:35:25,265 26488546ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 14:31:48,993 29872274ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 15:59:21,302 35124583ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:08:16,965 35660246ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:08:21,669 35664950ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:08:26,419 35669700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:09:38,594 35741875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:09:43,214 35746495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:09:47,636 35750917ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:48:31,419 38074700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:48:35,966 38079247ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:48:40,482 38083763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:56:17,411 38540692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:56:22,035 38545316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 16:56:26,645 38549926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:08:17,146 39260427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:08:21,724 39265006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:08:26,333 39269614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:19:33,071 39936352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:19:37,690 39940971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:19:42,238 39945519ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 17:21:59,640 40082921ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 18:28:08,855 44052136ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 18:28:13,252 44056533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 18:28:17,619 44060900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:02:38,948 46122229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:11:15,940 46639221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:11:20,473 46643754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:11:24,929 46648211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:12:44,656 46727938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:12:49,172 46732453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:12:53,641 46736922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:17:16,698 46999979ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:40:41,881 48405162ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:41:19,915 48443196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:41:24,509 48447790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:41:29,088 48452369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:49:33,075 48936356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:49:37,732 48941013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 19:49:42,310 48945591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 21:09:26,918 53730199ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-08 21:55:08,584 56471865ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-08 22:42:22,482 59305763ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-08 22:44:00,755 59404036ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:16:56,536 93779817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:01,114 93784395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:05,740 93789021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:17,538 93800819ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:22,585 93805866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:27,132 93810413ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:39,134 93822415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:43,727 93827008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:49,603 93832884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:17:58,714 93841995ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:18:03,434 93846715ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:18:09,950 93853231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:22:46,841 94130122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:22:53,762 94137043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:23:00,795 94144076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:26:07,401 94330682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:26:11,995 94335276ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:26:16,573 94339854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 08:41:13,245 95236526ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-09 09:23:48,580 97791861ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 09:27:01,903 97985184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-09 10:29:23,443 101726724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 10:29:27,882 101731163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 10:29:32,257 101735538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 11:25:23,434 679760ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-09 11:59:53,949 2750275ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 12:28:41,628 4477954ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 12:28:45,973 4482299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 12:28:50,348 4486674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 12:36:16,750 4933076ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 13:38:12,769 8649095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 13:38:17,163 8653489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 13:38:22,538 8658864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:19:15,831 11112157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:19:20,330 11116656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:19:24,661 11120987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:43:07,929 12544256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:43:15,102 12551428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:43:22,696 12559022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 14:45:24,910 12681236ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:11:26,082 14242408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:11:31,457 14247783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:11:35,833 14252159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:18:58,454 14694780ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:25:43,277 15099603ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 15:28:09,262 15245589ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 16:22:55,166 18531493ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 16:23:27,575 18563901ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 16:41:39,173 19655499ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 20:11:35,337 32251663ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 20:43:36,158 34172484ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:32:21,249 37097575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:32:25,827 37102153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:32:30,147 37106473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:52:46,806 38323132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:52:51,494 38327820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:52:56,182 38332508ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-09 21:58:02,279 38638605ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 07:49:13,035 74109361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 07:49:17,394 74113721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 07:49:21,848 74118174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 08:49:36,591 77732917ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-10 09:57:52,605 81828931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 09:57:59,153 81835479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 09:58:05,935 81842261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:41:45,283 88061609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:41:49,705 88066031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:41:54,065 88070391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:56:17,345 88933671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:56:21,783 88938109ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 11:56:26,221 88942547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:25:14,822 90671149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:25:19,261 90675587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:25:23,714 90680040ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:27:29,913 90806239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:27:34,538 90810865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:27:39,117 90815443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:40:18,891 91575217ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-10 12:41:36,804 91653131ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:08:34,931 93271257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:08:41,431 93277757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:08:47,838 93284164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:10:25,102 93381428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:10:31,569 93387896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 13:10:38,149 93394475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:07:17,472 96793798ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:09:46,345 96942671ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:14:28,121 97224447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:14:32,387 97228713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:14:36,702 97233028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:16:43,289 97359615ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:16:47,649 97363975ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:17:20,402 97396728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:17:56,905 97433232ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:18:01,140 97437466ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:18:05,453 97441779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:22:00,995 97677321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:22:05,120 97681446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:24:17,632 97813959ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:32:45,357 98321683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:33:20,116 98356442ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:35:45,331 98501657ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 14:37:40,308 98616634ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 16:18:08,931 238265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 16:18:15,604 244938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 16:18:20,588 249922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 17:35:04,081 4853414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 17:53:46,274 5975608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 17:53:50,743 5980077ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 17:53:55,166 5984499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 18:02:25,557 6494890ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 18:02:30,010 6499344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 18:02:34,417 6503751ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 19:38:24,675 12254009ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-10 19:38:49,272 12278605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 19:38:55,585 12284918ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 19:39:02,101 12291435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 19:49:57,005 12946338ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 21:11:13,462 17822796ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 21:12:20,957 17890291ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 21:12:24,973 17894306ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 21:13:01,867 17931201ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-10 22:03:23,428 20952762ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 00:08:51,738 28481071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 00:08:56,129 28485462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 00:09:00,707 28490041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 08:48:35,124 59664458ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 09:00:30,064 60379397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 09:00:36,565 60385899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 09:00:46,441 60395774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 09:17:52,579 61421913ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 09:29:48,045 62137378ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:06:59,113 64368446ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:07:14,130 64383463ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:17:50,717 65020050ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:29:46,906 65736239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:29:51,388 65740721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:29:56,063 65745397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:56:41,939 67351272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:56:46,361 67355695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 10:56:50,737 67360070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:36:54,361 69763695ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:38:10,985 69840318ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:39:03,097 69892431ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:40:34,499 69983833ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:40:50,985 70000318ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:41:39,614 70048948ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 11:47:48,684 70418017ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 12:01:54,464 71263798ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:01:29,822 78439155ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:05:49,854 78699187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:05:54,338 78703672ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:05:59,019 78708352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:06:31,303 78740637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:06:35,710 78745043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:06:40,210 78749544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:10:53,697 79003031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:10:58,370 79007703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:11:02,979 79012313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:12:16,767 79086101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:12:21,362 79090695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:12:26,267 79095601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:13:43,420 79172754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:13:47,826 79177159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:13:52,236 79181569ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:29:27,693 80117027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:29:32,288 80121621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 14:29:36,694 80126027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 15:09:01,597 82490930ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 16:54:02,199 88791532ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 16:54:09,793 88799127ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 16:54:49,825 88839158ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 16:56:53,539 88962872ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:23:08,635 90537968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:23:13,042 90542375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:23:17,417 90546750ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:52:28,373 92297706ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:52:32,888 92302222ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 17:52:37,389 92306723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 18:34:27,616 94816949ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-11 20:59:20,332 103509665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 20:59:24,863 103514196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-11 20:59:29,301 103518635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 07:39:18,912 37499057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 08:50:14,214 41754359ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:13:48,153 43168297ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:36:46,190 44546334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:37:14,427 44574571ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:37:21,756 44581900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:48:33,278 45253422ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:48:37,794 45257938ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:48:42,279 45262423ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:58:04,635 45824779ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:58:09,168 45829312ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 09:58:13,683 45833828ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:14,641 47274785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:19,047 47279192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:23,595 47283740ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:42,456 47302600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:46,894 47307038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:22:51,441 47311586ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:37:28,413 48188558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:37:33,836 48193980ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:37:38,273 48198417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:41:34,561 48434705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:41:39,045 48439190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:41:43,546 48443690ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:42:55,147 48515291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:42:59,835 48519979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 10:43:04,443 48524588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 11:46:58,324 52358468ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 11:54:18,796 52798940ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 16:03:01,702 67721847ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 16:03:11,626 67731770ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 16:30:52,726 69392871ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 16:30:57,712 69397856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 16:31:02,431 69402576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 18:01:03,204 74803349ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 18:01:07,720 74807864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 18:01:12,127 74812271ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:15:04,813 82844957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:15:09,469 82849613ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:15:14,157 82854302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:33:00,200 83920344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:33:04,731 83924876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:33:09,169 83929314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:40:49,014 84389158ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 20:40:52,686 84392830ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-12 21:20:58,664 86798808ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-13 06:13:18,031 14324876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 06:13:22,501 14329345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 06:13:26,813 14333658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 07:15:56,835 18083680ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 08:21:23,498 22010342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 08:21:27,849 22014694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 08:21:32,258 22019103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 08:56:41,493 24128338ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 14:46:39,752 45126597ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 15:28:57,868 47664713ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 15:29:02,485 47669330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 15:29:07,025 47673870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 15:46:05,570 48692414ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-13 18:28:05,288 58412133ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 23:47:47,058 77593903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 23:47:51,674 77598519ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-13 23:47:56,268 77603113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 10:13:22,052 10723202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 10:13:26,614 10727764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 10:13:31,130 10732280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:10:57,335 21378485ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:11:01,820 21382970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:11:06,227 21387377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:15:11,948 21633098ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:15:16,401 21637552ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 13:15:20,807 21641958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 15:09:41,018 28502168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 15:09:45,441 28506592ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 15:09:49,926 28511076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 16:33:28,641 33529791ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-14 17:21:46,950 36428100ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 17:45:05,231 37826381ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 17:47:09,398 37950548ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 17:49:14,597 38075747ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:25:36,695 47457845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:25:41,195 47462346ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:25:45,649 47466799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:51:38,423 49019573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:51:42,892 49024042ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-14 20:51:47,376 49028526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 05:47:56,139 81197289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 05:48:00,528 81201679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 05:48:04,844 81205994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 06:41:47,694 84428844ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 06:41:55,322 84436472ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 06:42:02,401 84443551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 08:16:50,580 90131730ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 08:16:55,035 90136185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 08:17:00,643 90141794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 08:22:35,464 90476615ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 09:20:59,895 93981045ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 09:55:22,212 96043362ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 10:35:35,021 98456171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 10:35:41,542 98462692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 10:35:49,133 98470283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 10:38:11,159 98612310ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 10:49:29,858 99291008ms Service                TicketRefund       - System.AggregateException: One or more errors occurred. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.TicketRefund(String recordLocation, String ticketNumber, Boolean isEMD)
   at VietnamAirlines.ServiceLibrary.Service.TicketRefund(String recordLocation, String ticketNumber, Boolean isEMD, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<RefundTicket>d__31.MoveNext()<---

ERROR 2025-09-15 11:10:57,656 100578806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 11:11:02,283 100583433ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 11:11:09,735 100590885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 13:41:48,111 5221325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 13:41:51,268 5224482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 13:41:54,362 5227576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 14:42:41,222 8874437ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 14:56:56,109 9729323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 14:57:00,515 9733729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 14:57:04,922 9738136ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:07:31,198 10364412ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:10:57,049 10570263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:11:01,799 10575013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:11:06,206 10579420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:19:47,647 11100861ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-15 15:46:21,760 12694974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 16:39:35,877 15889091ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 16:39:40,408 15893622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 16:39:44,813 15898027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 19:24:51,644 5265379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 19:24:56,301 5270036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 19:25:00,831 5274567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 20:47:57,053 10250788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 20:48:04,241 10257976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 20:48:11,240 10264976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 22:41:23,560 17057296ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 22:41:28,514 17062249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-15 22:41:32,967 17066703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 08:50:12,960 53586696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 08:50:20,399 53594134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 08:50:27,585 53601321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 09:19:41,998 55355734ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 09:58:10,665 57664400ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 10:16:09,745 58743481ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-16 10:21:39,062 59072797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 10:21:43,500 59077235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 10:21:47,859 59081595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:10:01,617 65575353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:10:06,209 65579944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:10:10,803 65584538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:14:52,221 65865956ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:29:08,556 66722292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:29:13,056 66726792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 12:29:17,463 66731198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 14:05:34,265 72508000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 14:05:38,796 72512532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 14:05:43,236 72516971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:25:41,443 77315179ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:25:45,787 77319523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:25:50,240 77323976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:51:48,076 78881812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:51:54,640 78888375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 15:52:02,562 78896298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 16:54:41,786 82655521ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:27:06,322 88200057ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:37:07,444 88801179ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:46:29,810 89363546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:46:34,403 89368139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:46:39,029 89372764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:49:19,838 89533573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:49:24,462 89538197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 18:49:29,040 89542776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 19:04:26,251 90439986ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-16 20:23:59,062 95212798ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 20:24:03,578 95217314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-16 20:24:08,080 95221816ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 07:52:12,771 32097658ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:08:32,101 33076987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:08:36,656 33081543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:08:41,073 33085959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:22:45,874 33930761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:22:50,312 33935198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:22:54,687 33939574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:32:25,501 34510388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:32:30,013 34514900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 08:32:34,466 34519353ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 09:19:52,522 37357409ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 10:31:23,115 41648002ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:02:19,081 43503968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:02:23,456 43508343ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:02:28,318 43513204ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:02:46,678 43531565ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:43:10,514 45955400ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:43:14,874 45959760ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:43:19,671 45964558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:51:31,330 46456217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:51:35,791 46460678ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 11:51:40,237 46465124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:13:44,990 47789876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:13:49,412 47794298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:13:53,802 47798688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:14:05,677 47810564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:14:10,069 47814955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:14:14,444 47819330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:57:35,305 50420192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:57:39,696 50424583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 12:57:44,087 50428974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 13:00:37,719 50602605ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-17 13:03:32,908 50777795ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-17 13:14:05,937 51410824ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:35:35,049 56299936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:35:39,565 56304452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:35:44,066 56308952ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:37:10,457 56395343ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:37:15,067 56399953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 14:37:19,473 56404360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:09:19,466 58324352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:09:23,825 58328712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:09:28,216 58333103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:42:14,150 60299036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:42:18,823 60303709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:42:23,313 60308200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:44:25,647 60430534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:44:30,278 60435164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 15:44:34,872 60439758ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 16:17:26,695 62411582ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-17 17:40:31,554 67396441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 17:40:36,117 67401004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 17:40:40,743 67405630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:05:47,346 68912233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:05:54,488 68919375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:06:01,709 68926595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:06:29,773 68954659ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:06:38,085 68962972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 18:06:45,383 68970269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 19:28:28,246 73873133ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 19:28:33,856 73878743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 19:28:38,200 73883087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 20:25:57,168 77322055ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:11:35,627 80060513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:11:40,252 80065139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:11:44,862 80069748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:58:36,471 82881357ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:58:40,971 82885858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 21:58:45,393 82890280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 22:37:09,417 85194304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 22:37:15,870 85200757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-17 22:37:22,231 85207117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:01:46,849 90271735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:01:51,251 90276138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:01:55,689 90280576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:08:00,750 90645636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:08:05,218 90650105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:08:09,642 90654529ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:32:28,901 92113787ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:32:34,448 92119335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 00:32:39,558 92124444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 02:06:44,430 97769317ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 09:09:38,132 18728300ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 09:47:02,826 20972994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 09:47:07,249 20977417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 09:47:12,515 20982683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 09:53:14,107 21344275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 10:50:57,791 24807958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 10:51:04,557 24814725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 10:51:11,042 24821210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 11:13:48,888 26179055ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 11:15:38,506 26288673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 11:34:35,660 27425828ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 11:45:04,034 28054201ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 12:02:32,011 29102179ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 13:52:27,996 35698163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 13:52:32,498 35702665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 13:52:36,951 35707119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 14:29:18,665 37908832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 14:29:23,056 37913223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 14:29:27,367 37917535ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 14:42:24,190 38694358ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:08:07,071 40237239ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:13:20,901 40551069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:13:25,292 40555460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:13:29,684 40559851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:39:36,791 42126959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:39:41,167 42131334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:39:45,542 42135710ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 15:57:57,078 43227245ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 16:13:18,878 44149046ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 16:46:15,711 46125878ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:00:14,154 50564322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:00:18,514 50568681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:00:22,858 50573025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:18:27,343 51657511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:18:35,594 51665762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:18:39,969 51670137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:18:56,534 51686702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:19:02,565 51692732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 18:19:07,003 51697171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:44:41,351 60431518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:44:46,664 60436832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:44:52,274 60442441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:52:13,864 60884032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:52:42,257 60912425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 20:52:56,026 60926193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 21:51:57,816 64467983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 21:52:02,317 64472484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 21:52:06,803 64476970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 21:55:28,007 64678174ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:12:01,430 65671597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:12:05,883 65676051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:12:10,337 65680505ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:13:49,941 65780109ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:13:55,597 65785764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:14:00,081 65790249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:15:45,184 65895352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:15:49,655 65899823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:15:54,172 65904339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:17:28,881 65999049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:17:33,398 66003566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:17:37,836 66008003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:22:33,472 66303639ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:30:45,482 66795650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:30:49,936 66800103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 22:30:54,406 66804574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 23:56:11,995 71922163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 23:56:16,385 71926553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-18 23:56:20,791 71930959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:13,770 91363937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:18,379 91368547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:22,989 91373157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:48,413 91398581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:53,539 91403707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 05:20:58,102 91408269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:19:46,745 102136913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:19:53,402 102143570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:20:03,052 102153219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:23:45,606 102375774ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:23:50,715 102380883ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:23:55,342 102385509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:31:25,524 102835692ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 08:33:52,906 102983073ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 09:21:05,151 1412727ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 09:37:58,721 2426297ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:26:51,168 5358745ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:30:34,004 5581581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:30:49,208 5596785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:31:05,879 5613455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:42:54,048 6321625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 10:43:07,864 6335441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 11:20:52,631 8600208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 11:20:57,116 8604692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 11:21:01,632 8609209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 11:25:36,579 8884156ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:08:56,664 11484241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:09:02,618 11490194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:09:07,915 11495492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:46:21,637 13729214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:46:26,169 13733746ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:46:30,577 13738154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:49:59,782 13947358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:50:04,234 13951811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 12:50:09,657 13957233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 13:06:36,100 14943677ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 13:06:42,303 14949880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 13:06:46,679 14954256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 13:44:23,324 17210900ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 14:19:05,634 19293211ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 14:19:39,664 19327240ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 14:57:42,046 21609623ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 15:36:01,591 23909168ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 15:38:16,462 24044039ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 15:39:18,514 24106090ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 15:59:34,965 25322542ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:00:05,171 25352748ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:01:15,149 25422726ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:06:45,194 25752771ms Service                CancelBooking      - System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Rest.Controller.GenerateErrorMessage(String url, BaseRes response)
   at VietnamAirlines.Api.Rest.Controller.<RetrievePNR>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.Rest.Workflow.<CancelBooking>d__27.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at VietnamAirlines.Api.VietnamAirlinesCommand.CancelBooking(String recordLocation, List`1 flightNos)
   at VietnamAirlines.ServiceLibrary.Service.CancelBooking(String recordLocation, List`1 flightNos, VNASecureMessage secureMessage)
---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Rest.Controller.GenerateErrorMessage(String url, BaseRes response)
   at VietnamAirlines.Api.Rest.Controller.<RetrievePNR>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.Rest.Workflow.<CancelBooking>d__27.MoveNext()<---

ERROR 2025-09-19 16:07:30,980 25798556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:08:31,595 25859171ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:10:14,635 25962212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:13:21,763 26149340ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:19:58,009 26545586ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:20:42,012 26589589ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:24:53,523 26841100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:34:03,981 27391557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:35:55,693 27503269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:37:38,796 27606373ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 16:38:23,081 27650657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 17:46:19,936 31727512ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 17:49:28,734 31916311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 18:27:47,795 34215371ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 19:01:02,642 36210219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 19:01:07,111 36214688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 19:01:11,486 36219063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:26:50,226 44957802ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:30:36,054 45183631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:30:42,582 45190158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:30:49,004 45196580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:40:11,881 45759458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 21:42:16,335 45883911ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:10:15,792 51163369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:10:22,215 51169791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:10:28,606 51176183ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:15:47,830 51495407ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:15:54,299 51501876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:00,706 51508283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:29,522 51537099ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:36,007 51543583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:42,397 51549974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:49,289 51556866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:16:55,743 51563320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-19 23:17:02,275 51569852ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 06:28:52,039 77479616ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 09:42:00,843 89068420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 09:42:07,657 89075233ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 09:42:14,188 89081765ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:08:49,355 94276931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:08:53,683 94281260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:08:58,090 94285667ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:09:07,122 94294699ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:09:11,497 94299074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:09:15,997 94303574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 11:51:57,207 96864784ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 12:18:31,065 98458642ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 12:41:32,148 99839725ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 13:43:12,039 103539615ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 13:43:16,617 103544194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 13:43:21,211 103548788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 15:50:54,841 6789372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 15:50:59,483 6794013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 15:52:22,859 6877390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 16:25:47,460 8881991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 16:27:28,299 8982829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 16:27:32,815 8987345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 18:25:11,079 16045609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 18:25:15,689 16050219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 18:25:20,189 16054720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 19:19:39,084 19313615ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-20 23:15:28,368 33462899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 23:15:32,713 33467243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-20 23:15:37,135 33471665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:56:38,467 75532997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:56:42,795 75537326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:56:47,170 75541701ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:59:36,883 75711414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:59:41,290 75715820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 10:59:45,757 75720288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 14:29:06,928 88281459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 14:29:11,350 88285881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 14:29:15,757 88290287ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 16:10:19,061 94353591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 16:10:25,312 94359842ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 16:10:48,439 94382969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 16:13:48,392 94562923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 17:40:00,910 99735440ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-21 18:06:10,382 101304912ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 18:06:24,883 101319413ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 18:38:14,410 103228941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 18:38:18,879 103233410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 18:38:23,286 103237817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 20:02:49,576 3896413ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:20:00,594 12127431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:20:09,517 12136354ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:20:17,330 12144167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:20:57,897 12184734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:21:05,023 12191860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:21:12,729 12199566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:21:20,146 12206983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:21:27,975 12214812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-21 22:21:35,164 12222001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 02:38:01,901 27608738ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 09:25:14,462 52041299ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 09:27:59,276 52206113ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 09:42:14,106 53060943ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 13:31:03,196 66790033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 13:31:07,838 66794675ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 13:31:12,464 66799301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 15:25:28,246 73655083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 15:25:32,621 73659458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 15:25:37,089 73663926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:15:50,399 76677235ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:16:10,745 76697582ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:17:16,754 76763590ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:18:06,554 76813391ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:18:22,962 76829799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:18:56,730 76863567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:20:06,002 76932839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:21:49,040 77035877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:22:38,370 77085207ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:24:51,166 77218003ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:28:05,276 77412112ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:31:35,384 77622221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:32:33,317 77680154ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:33:18,414 77725251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:34:06,877 77773714ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:34:31,786 77798623ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:36:08,909 77895746ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:37:31,524 77978361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:37:38,417 77985253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:37:42,886 77989723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:39:09,139 78075976ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:42:22,892 78269729ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:42:39,174 78286011ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:43:15,381 78322218ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:43:42,051 78348888ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:44:15,601 78382438ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:44:40,650 78407487ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 16:52:17,067 78863904ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:01:39,289 90226126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:01:45,822 90232659ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:01:52,510 90239347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:50:36,306 93163143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:50:40,760 93167597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 20:50:45,244 93172081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-22 21:34:18,083 95784920ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 00:14:00,913 169729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 00:14:18,071 186887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 00:14:25,790 194606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 01:07:21,269 3370085ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 01:07:25,722 3374538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 01:07:30,143 3378959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 06:13:45,054 21753870ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:20:13,214 29342030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:20:20,731 29349547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:20:27,887 29356704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:27:57,173 29805989ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:42:42,506 30691322ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:43:09,430 30718246ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 08:44:48,075 30816892ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:17:02,384 32751200ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:20:33,463 32962280ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:20:43,042 32971859ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:20:50,308 32979124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:40:18,219 34147035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:40:22,672 34151488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:40:27,018 34155834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 09:47:10,229 34559045ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 10:06:49,938 35738754ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 10:44:59,624 38028440ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 10:45:04,014 38032830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 10:45:08,500 38037317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:41:50,042 41438858ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:44:33,181 41601997ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:45:37,719 41666535ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:49:37,719 41906535ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:53:45,575 42154391ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:56:38,630 42327446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:56:43,270 42332086ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:56:47,708 42336525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:58:50,973 42459789ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:58:55,786 42464602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 11:59:00,333 42469149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 12:03:22,630 42731446ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:20:24,721 47353537ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:20:29,144 47357960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:20:33,519 47362335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:27:02,559 47751375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:27:06,903 47755719ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:27:11,294 47760110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:30:04,669 47933485ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:32:13,781 48062597ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:33:05,675 48114492ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:44:06,598 48775414ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:47:25,835 48974651ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:53:43,075 49351891ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:54:56,487 49425304ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:57:27,301 49576117ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 13:58:36,542 49645358ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:00:37,662 49766478ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:01:16,214 49805030ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:19:13,546 50882362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:19:20,546 50889362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:19:27,549 50896365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:24:16,260 51185076ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:27:23,882 51372699ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 14:42:03,905 52252721ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:04:55,428 53624244ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:04:59,820 53628636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:05:05,742 53634558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:19:34,204 54503020ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:32:20,377 55269193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:32:24,877 55273693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 15:32:29,284 55278100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:03:34,594 57143410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:09:03,284 57472100ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:10:54,517 57583333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:11:04,018 57592834ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:12:18,181 57666997ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:13:21,764 57730580ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:19:21,792 58090608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:25:05,941 58434757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:28:42,886 58651702ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:36:03,098 59091914ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:36:14,380 59103196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:37:23,897 59172714ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 16:52:09,994 60058810ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:00:25,113 60553929ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:06:10,120 60898937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:06:15,526 60904342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:06:19,918 60908734ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:48:04,729 63413545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:57:11,759 63960576ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:57:16,447 63965263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:58:59,487 64068303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:59:00,285 64069101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:59:04,847 64073663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 17:59:25,526 64094342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:17:36,523 65185339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:18:01,267 65210083ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:19:36,610 65305427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:30:14,745 65943561ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:30:41,019 65969835ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 18:31:00,239 65989055ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 19:24:25,958 69194775ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-23 20:01:15,436 71404253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 20:01:28,875 71417691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 20:01:35,304 71424120ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 22:08:50,033 79058849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 22:08:55,330 79064146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 22:09:00,611 79069428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-23 23:17:35,475 83184292ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-24 09:53:05,832 16878798ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 10:18:08,355 18381321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 10:18:13,980 18386946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 10:18:18,308 18391274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 10:33:35,346 19308312ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:20:27,109 32920075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:20:33,609 32926575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:20:45,203 32938169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:21:41,004 32993970ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:21:43,973 32996939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:21:50,489 33003455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:22:07,363 33020329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 14:26:58,371 33311338ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:04:10,112 39143078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:04:55,209 39188175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:05:01,663 39194629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:06:44,702 39297668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:08:32,399 39405365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:08:54,496 39427462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:10:37,532 39530498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:25:49,557 40442523ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 16:32:24,786 40837752ms Service                MoveNext           - Running time: 103-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-09-24 16:38:34,998 41207964ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 18:43:13,695 48686662ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:13:01,158 54074124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:13:05,643 54078609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:13:10,582 54083548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:21:13,194 54566160ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:21:19,804 54572770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:21:26,382 54579348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 20:34:33,986 55366952ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 21:07:00,821 57313787ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-24 21:07:49,263 57362229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 21:07:53,778 57366744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 21:07:58,294 57371260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-24 22:32:32,213 62445179ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 00:03:54,932 67927898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 00:03:59,463 67932429ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 00:04:03,964 67936930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 05:10:47,605 86340571ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 05:47:22,852 88535818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 05:47:55,965 88568931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 05:48:02,918 88575884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 05:48:07,403 88580369ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 06:06:51,726 89704692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:30:30,537 94723503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:32:52,989 94865955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:32:57,411 94870377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:33:02,615 94875581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:34:08,870 94941836ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:34:16,042 94949008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:34:31,621 94964587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:54:52,412 96185378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:56:35,452 96288418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:58:18,509 96391475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 07:59:45,798 96478764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:01:28,856 96581822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:01:36,589 96589555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:03:19,629 96692595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:05:44,272 96837238ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:08:17,912 96990878ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:09:09,228 97042194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:09:55,279 97088245ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:10:01,046 97094012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:10:52,269 97145235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:11:36,795 97189761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:11:37,982 97190948ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:11:44,076 97197042ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:12:35,305 97248271ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:13:19,826 97292792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:14:10,221 97343187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:14:39,631 97372597ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:15:39,197 97432163ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:16:16,310 97469276ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:16:22,655 97475621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:17:22,050 97535016ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:18:05,148 97578114ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:18:46,933 97619899ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:20:34,427 97727393ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:29:12,427 98245393ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:29:26,632 98259598ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:29:39,461 98272427ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:30:50,296 98343262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:30:55,468 98348434ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:31:45,035 98398001ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:32:33,336 98446302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:34:16,361 98549327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:35:02,818 98595784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:36:45,609 98698575ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:36:45,875 98698841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:37:37,067 98750033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:38:12,195 98785161ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:38:28,915 98801881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:39:20,107 98853073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:39:30,467 98863433ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:41:03,116 98956083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:41:13,509 98966475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:42:56,549 99069515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:43:21,973 99094939ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:44:08,369 99141335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:45:30,876 99223842ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:46:59,363 99312329ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:49:34,627 99467593ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:55:39,464 99832430ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:58:05,417 99978383ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 08:58:54,857 100027823ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:52:45,543 103258509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:53:00,107 103273073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:53:04,716 103277682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:57:46,131 103559097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:57:53,617 103566583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 09:58:01,895 103574861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:26:44,036 908160ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:26:48,677 912801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:26:53,599 917724ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:50:06,242 2310366ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:55:29,994 2634118ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 10:55:44,454 2648578ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 11:09:17,408 3461533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 11:09:21,831 3465955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 11:09:26,253 3470377ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 12:10:52,245 7156370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 12:10:58,839 7162964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 12:11:07,153 7171278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 13:10:40,198 10744323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 13:10:44,763 10748887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 13:10:49,324 10753449ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 14:24:12,851 15156976ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 14:28:14,871 15398995ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 14:36:33,675 15897799ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 15:09:25,491 17869615ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 15:09:29,866 17873991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 15:09:34,296 17878420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:06:13,976 21278100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:06:34,994 21299118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:08:52,678 21436802ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:14:49,873 21793998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:14:56,577 21800701ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:15:01,952 21806076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:15:09,812 21813937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:19:25,555 22069679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:21:08,642 22172766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:21:15,439 22179563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:24:53,085 22397209ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 16:56:22,769 24286894ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 17:17:32,250 25556374ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 17:51:05,143 27569268ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 19:46:53,355 34517479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 19:47:01,105 34525230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 19:47:08,653 34532777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-25 21:39:36,809 41280933ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-25 22:13:36,369 43320493ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 07:30:43,453 76747577ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 07:30:47,844 76751968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 07:30:52,186 76756311ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 07:48:00,127 77784252ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 10:09:13,375 86257499ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 10:14:18,511 86562636ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 10:14:23,105 86567230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 10:14:27,587 86571711ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 10:59:04,645 89248769ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 11:29:07,832 91051957ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 11:59:09,923 92854047ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 12:02:12,566 93036691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 12:02:16,911 93041035ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 12:02:21,286 93045410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:38:17,022 98801147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:38:21,648 98805772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:38:26,039 98810163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:58:20,545 100004669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:58:24,951 100009075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 13:58:29,795 100013920ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:03:47,642 100331767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:03:59,831 100343955ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:04:04,409 100348534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:05:52,763 100456887ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:06:00,920 100465044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:06:00,982 100465106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:06:05,295 100469420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:06:05,326 100469451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:06:09,733 100473857ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:22:08,047 101432172ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:24:10,810 101554934ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:25:18,800 101622925ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:57:19,224 103543348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:57:23,693 103547818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 14:57:28,147 103552271ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 15:13:40,423 120864ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 15:53:18,621 2499062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:06:28,242 3288683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:06:39,572 3300013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:07:31,685 3352127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:08:22,604 3403045ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:09:03,014 3443455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:10:46,045 3546486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:10:50,655 3551096ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:10:50,983 3551424ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:11:22,423 3582865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:12:33,399 3653840ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:12:33,992 3654434ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:13:12,964 3693406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:13:35,826 3716267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:13:41,857 3722299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:14:07,469 3747910ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:14:17,032 3757473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:15:21,351 3821792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:15:48,056 3848498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:17:04,407 3924848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:17:11,892 3932333ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:17:49,802 3970243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:19:32,842 4073283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:19:40,702 4081144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:21:15,898 4176340ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:21:31,556 4191997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:23:14,597 4295038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:25:38,922 4439363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:26:09,285 4469726ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:27:52,314 4572756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:28:28,880 4609321ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:29:35,355 4675796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:30:19,140 4719582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:32:50,014 4870456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:33:17,658 4898099ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:35:00,698 5001140ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:35:45,655 5046097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 16:41:17,835 5378276ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 17:17:22,176 7542617ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 17:21:06,129 7766570ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 17:26:11,219 8071660ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 19:09:30,999 14271440ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-26 19:09:48,484 14288925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 19:09:53,030 14293471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 19:09:57,673 14298114ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-26 23:17:07,207 29127648ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 08:29:01,340 62241781ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-27 09:26:18,591 65679032ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 10:23:06,422 69086863ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 10:23:10,875 69091316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 10:23:15,266 69095707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 12:31:18,039 76778480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 12:31:22,429 76782870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 12:31:26,883 76787325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:01:43,344 82203785ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:01:47,750 82208192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:01:52,407 82212848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:15:05,877 83006318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:15:10,611 83011052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:15:15,002 83015443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:16:15,617 83076058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:16:19,945 83080386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:16:24,304 83084746ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:36:17,823 84278264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:36:22,417 84282859ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 14:36:26,934 84287375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 16:15:55,747 90256188ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 16:30:28,032 91128473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 16:32:11,108 91231549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 16:32:16,186 91236627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 16:47:17,617 92138058ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 18:47:12,886 99333328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 18:47:17,309 99337750ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 18:47:21,746 99342187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 19:56:37,126 103497567ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:19:48,871 7674361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:19:53,528 7679018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:19:58,044 7683534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:22:58,740 7864230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:23:03,975 7869465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-27 22:23:08,616 7874106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:12:48,208 14453698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:12:57,021 14462511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:13:04,164 14469653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:18:50,726 14816216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:18:59,523 14825012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 00:19:14,524 14840014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 07:42:52,549 41458038ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 07:42:58,033 41463523ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 07:43:02,393 41467883ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 07:53:26,354 42091843ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 07:53:56,747 42122236ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:05:53,704 57239194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:06:00,768 57246257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:06:07,784 57253274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:24:20,680 58346169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:24:25,023 58350513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:24:29,383 58354873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 12:58:58,579 60424068ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:15:50,215 65035704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:15:54,668 65040158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:15:59,073 65044563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:49:30,411 67055901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:49:36,803 67062292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 14:49:43,163 67068652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-28 20:00:41,554 85727044ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-29 08:36:47,121 26666148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 08:36:53,513 26672539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 08:36:59,857 26678884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 09:46:11,003 30830029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 09:46:15,592 30834618ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 09:46:20,155 30839181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 10:35:54,030 33813056ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 12:24:07,680 40306707ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 12:24:12,134 40311161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 12:24:16,556 40315583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:01:55,120 42574147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:01:59,636 42578663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:02:04,246 42583272ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:03:43,330 42682356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:03:47,877 42686903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:03:52,456 42691482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:21:38,168 43757194ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:21:42,747 43761773ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:21:47,294 43766320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:34:08,846 44507872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:34:13,236 44512263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 13:34:17,534 44516560ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 14:26:07,969 47626995ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-29 14:26:12,625 47631652ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-29 14:26:19,641 47638668ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-29 14:29:57,491 47856517ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:13:42,626 50481652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:13:47,174 50486200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:13:51,735 50490762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:14:33,333 50532360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:14:37,865 50536892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 15:14:42,288 50541314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:02:43,237 53422263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:28:40,882 54979908ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:30:27,611 55086638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:30:33,127 55092153ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:30:37,877 55096904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:33:26,075 55265101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:33:30,668 55269695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:33:35,184 55274211ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:39:20,542 55619568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:39:29,860 55628886ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:39:39,531 55638557ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:45:57,963 56016989ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 16:48:29,086 56168112ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:23:41,580 58280606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:23:46,079 58285105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:23:51,361 58290387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:46:40,268 59659295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:46:44,722 59663748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 17:46:49,160 59668186ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 20:49:09,730 70608756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 20:49:14,230 70613256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 20:49:18,637 70617663ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:12:16,332 71995358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:12:20,926 71999953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:12:25,521 72004547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:26:10,246 72829273ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:26:14,653 72833679ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 21:26:19,981 72839008ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 22:35:35,868 76994894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 22:35:40,321 76999347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-29 22:35:44,711 77003738ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 05:29:40,818 101839845ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 06:30:46,209 1116397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 06:30:50,725 1120913ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 06:30:55,116 1125304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 07:56:15,455 6245643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 07:56:19,862 6250050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 07:56:24,159 6254347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 09:57:04,601 13494789ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 10:22:44,226 15034414ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 10:30:00,721 15470909ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 10:36:29,756 15859944ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 10:42:52,582 16242770ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 10:46:00,996 16431184ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 11:09:13,329 17823517ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 12:32:58,320 22848508ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 12:33:02,836 22853024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 12:33:07,243 22857431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 13:46:15,317 27245505ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 14:13:03,615 28853803ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-30 14:58:15,826 31566014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 14:58:20,186 31570374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 14:58:24,562 31574749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:04:46,673 31956861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:04:52,096 31962283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:04:56,455 31966643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:05:26,072 31996260ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:05:30,510 32000698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:05:34,872 32005060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:18:15,368 32765555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:18:19,821 32770009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:18:24,259 32774447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:28:32,438 33382625ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:44:26,090 34336278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:44:30,481 34340669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:44:34,888 34345076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:45:33,021 34403209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:45:37,412 34407600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:45:41,813 34412001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 15:58:24,368 35174555ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:20:05,191 43675378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:20:09,582 43679769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:20:13,957 43684145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:57:54,466 45944653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:57:58,982 45949170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 18:58:03,357 45953545ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 19:19:03,486 47213674ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 19:36:42,922 48273110ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 20:32:49,772 51639960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 20:32:56,257 51646445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-09-30 20:33:02,803 51652991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 09:53:07,443 99657631ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:13:47,214 100897402ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:15:08,924 100979111ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:32:55,914 102046102ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:33:00,321 102050509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:33:04,743 102054931ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:43:29,221 102679409ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:44:16,647 102726834ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:44:47,519 102757707ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 10:47:10,986 102901174ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 11:32:08,043 1189635ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-01 11:45:37,520 1999111ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:37:26,684 8708275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:37:31,232 8712823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:37:35,748 8717339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:38:25,423 8767014ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:38:29,830 8771421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:38:34,222 8775813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 13:57:44,651 9926242ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:53:48,089 16889681ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:54:03,121 16904712ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:57:05,873 17087464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:57:10,342 17091933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:57:14,732 17096323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:59:33,514 17235106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:59:37,952 17239544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 15:59:42,406 17243997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:18:16,000 18357592ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:18:22,610 18364202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:18:29,971 18371562ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:47:32,920 20114511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:47:37,483 20119074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:47:42,014 20123606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 16:53:51,104 20492696ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-01 17:39:38,955 23240546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 17:39:43,376 23244968ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 17:39:47,800 23249391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:02:37,168 35418759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:02:41,637 35423228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:02:46,137 35427729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:32:34,058 37215650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:32:38,543 37220134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-01 21:32:42,965 37224556ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 04:47:45,900 63327491ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:53:08,229 74449820ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:53:12,652 74454243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:53:18,260 74459851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:54:10,998 74512590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:54:15,405 74516997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 07:54:19,796 74521388ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 08:38:05,892 77147484ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 09:38:02,573 80744164ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 10:08:23,383 82564975ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 10:08:27,976 82569568ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 10:08:32,384 82573976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 11:04:32,139 85933730ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:03:59,914 89501505ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:04:44,841 89546432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:04:51,921 89553512ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:04:59,109 89560700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:20:23,344 90484936ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:42:07,163 91788755ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:42:11,585 91793177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 12:42:15,961 91797553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:40:21,711 95283302ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:40:53,948 95315539ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:53:52,205 96093797ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:53:56,826 96098417ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:54:01,428 96103019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:58:45,142 96386733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:58:49,736 96391327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:58:54,330 96395921ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:59:46,381 96447973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:59:51,007 96452598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 13:59:55,633 96457224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 14:03:51,651 96693242ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 14:03:56,151 96697743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 14:04:00,573 96702165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:00:42,142 100103733ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:03:42,384 100283975ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:12:56,464 100838056ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:33:57,674 102099265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:34:02,095 102103686ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 15:34:06,517 102108108ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 16:41:31,279 1742866ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 16:51:19,413 2331000ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 17:12:11,179 3582767ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 17:12:15,618 3587205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 17:12:20,008 3591595ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 17:20:33,184 4084771ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 18:38:23,730 8755317ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 18:38:30,214 8761801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 18:38:36,652 8768239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 21:27:01,944 18873531ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 21:33:43,612 19275199ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 21:58:05,738 20737325ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 22:13:20,177 21651764ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-02 22:44:34,407 23525994ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 22:44:38,798 23530385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-02 22:44:43,174 23534761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 07:46:47,359 56058946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 07:46:51,891 56063478ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 07:46:56,314 56067901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 08:37:14,032 59085619ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 10:15:39,848 64991435ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 10:35:57,055 66208642ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 10:36:20,861 66232448ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 11:50:13,527 70665114ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:05:37,313 71588900ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:07:57,631 71729218ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:24:53,778 72745365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:24:58,216 72749803ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:25:02,576 72754163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:30:58,923 73110510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:31:03,362 73114949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 12:31:07,831 73119418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 14:43:46,069 81077656ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 14:43:50,726 81082313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 14:43:55,320 81086907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 15:37:56,098 84327685ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 15:47:10,200 84881787ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-03 16:50:02,654 88654241ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-03 16:50:23,749 88675336ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:07:55,505 89727092ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:24:00,080 90691667ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:27:43,340 90914927ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:38:54,900 91586487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:38:59,510 91591097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 17:39:04,213 91595801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 18:41:53,902 95365489ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 21:47:10,713 2071453ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:34:11,899 4892639ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:34:16,462 4897202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:34:21,025 4901765ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:41:25,512 5326252ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:41:30,153 5330893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 22:41:34,778 5335518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 23:16:09,799 7410539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 23:16:14,377 7415117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-03 23:16:19,003 7419743ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 04:10:29,359 25070099ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-04 08:16:32,557 39833297ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 08:16:39,714 39840454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 08:16:46,824 39847564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 09:00:58,031 42498771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 09:01:02,893 42503633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 09:01:07,392 42508132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 10:59:26,704 49607444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 10:59:31,157 49611897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 10:59:35,548 49616288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 11:01:19,760 49720500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 11:01:24,291 49725032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 11:01:28,714 49729454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 11:18:55,173 50775913ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-04 12:05:19,149 53559889ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 13:13:32,865 57653605ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-04 14:25:59,238 61999978ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:09:39,801 68220541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:09:44,350 68225090ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:09:48,912 68229652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:06,038 68246778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:10,632 68251372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:15,304 68256044ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:50,731 68291471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:55,293 68296034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:10:59,887 68300627ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:59:28,353 71209093ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:59:35,244 71215985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 16:59:42,200 71222940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:00:14,624 71255364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:00:21,625 71262365ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:00:28,813 71269553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:01:30,724 71331464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:01:37,818 71338558ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:01:44,991 71345731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 17:10:17,346 71858086ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 19:42:57,885 81018625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 19:43:03,292 81024033ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 19:43:07,683 81028424ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 20:16:39,109 83039849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 20:16:43,750 83044490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-04 20:16:48,329 83049069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 08:56:15,941  2219ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:15,988  2266ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:15,988  2266ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:15,988  2266ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:17,410  3687ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:17,410  3687ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:22,285  8563ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:22,285  8563ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:32,661 18939ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:32,661 18939ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:35,380 21658ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:35,380 21658ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:40,334 26612ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:40,350 26628ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 08:56:49,413 35691ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:49,413 35691ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:49,445 35723ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:49,445 35723ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:51,476 37754ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:51,476 37754ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:51,913 38191ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:51,913 38191ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:56:56,460 42738ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:56:56,460 42738ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:01,878 48156ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:01,878 48156ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:03,739 50017ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:03,754 50032ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 08:57:07,411 53689ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:07,411 53689ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:07,646 53924ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:07,646 53924ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:08,521 54799ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:08,521 54799ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:12,490 58768ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:12,490 58768ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:18,371 64649ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:18,387 64665ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:31,992 78270ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:31,992 78270ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:35,149 81427ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:35,149 81427ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:43,822 90099ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:43,822 90099ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:48,259 94537ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:48,259 94537ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:53,650 99928ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:53,650 99928ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:57:54,494 100772ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:57:54,494 100772ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:01,291 107569ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:01,291 107569ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:01,885 108163ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:01,885 108163ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:06,729 113007ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:06,729 113007ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:09,011 115289ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:09,011 115289ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:11,215 117492ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:11,215 117492ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:11,871 118148ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:11,871 118148ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:12,871 119149ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:12,871 119149ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:15,699 121977ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:15,699 121977ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:18,511 124789ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:18,511 124789ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:21,262 127540ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:21,262 127540ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:22,356 128634ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:22,356 128634ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:30,106 136384ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:30,106 136384ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:40,279 146557ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:40,279 146557ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:41,967 148245ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:41,967 148245ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 08:58:42,217 148495ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:42,217 148495ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:45,201 151479ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:45,201 151479ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:50,843 157121ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:50,843 157121ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:58:55,265 161543ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:55,265 161543ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 08:58:56,625 162902ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:58:56,640 162917ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:03,188 169466ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:03,188 169466ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:04,437 170715ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:04,437 170715ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:04,625 170903ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:04,625 170903ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:11,751 178029ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:11,767 178044ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:13,626 179904ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:13,626 179904ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:16,360 182638ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:16,360 182638ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:18,455 184732ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:18,455 184732ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 08:59:19,079 185357ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:19,079 185357ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:22,877 189155ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:22,877 189155ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:23,752 190030ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:23,752 190030ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:23,752 190030ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:23,752 190030ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:25,440 191717ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:25,440 191717ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:32,628 198906ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:32,628 198906ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:32,628 198906ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:32,628 198906ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:35,440 201718ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:35,440 201718ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:35,518 201796ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:35,518 201796ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:38,300 204578ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:38,300 204578ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:40,566 206844ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:40,566 206844ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:42,050 208328ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:42,050 208328ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:48,113 214391ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:48,113 214391ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 08:59:55,474 221752ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 08:59:55,474 221752ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:00,178 226456ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:00,178 226456ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:01,834 228112ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:01,834 228112ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:06,856 233134ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:06,856 233134ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:07,778 234056ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:07,778 234056ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:09,644 235921ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:09,644 235921ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:12,487 238765ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:12,488 238766ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:15,566 241844ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:15,566 241844ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:24,176 250454ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:24,176 250454ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:33,506 259784ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:33,506 259784ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:42,601 268879ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:42,601 268879ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:44,945 271222ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:44,945 271222ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:49,257 275535ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:49,257 275535ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:50,148 276426ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:50,148 276426ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:54,430 280708ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:54,430 280708ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:00:54,993 281271ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:00:54,993 281271ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:00,571 286849ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:00,571 286849ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:04,540 290818ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:04,540 290818ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:05,180 291458ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:05,180 291458ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:06,993 293271ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:06,993 293271ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:10,587 296865ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:10,587 296865ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:18,354 304632ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:18,354 304632ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:27,667 313945ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:27,667 313945ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:32,230 318507ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:32,230 318507ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:33,464 319742ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:33,480 319757ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:34,870 321148ms RedisService           GetValue           - Error getting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:34,870 321148ms RedisService           GetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-05 09:01:36,870 323148ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:36,870 323148ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:36,902 323179ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:36,902 323179ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:41,324 327602ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:41,324 327602ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:42,949 329227ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:42,949 329227ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:43,059 329337ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:43,059 329337ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:44,215 330493ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:44,215 330493ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:01:56,341 342619ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:01:56,357 342635ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:02:03,529 349807ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:02:03,529 349807ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:02:07,154 353432ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:02:07,154 353432ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:02:13,561 359839ms RedisService           SetValue           - Error setting value in Redis: Object reference not set to an instance of an object.
ERROR 2025-10-05 09:02:13,576 359854ms RedisService           SetValue           - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-05 09:18:41,148 983695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:18:45,650 988197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:18:50,134 992681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:22:16,027 1198574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:22:21,653 1204200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:22:26,077 1208624ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 09:58:25,956 3368503ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-05 16:12:26,135 25808682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 16:12:30,760 25813307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 16:12:35,370 25817917ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 17:38:07,062 30949609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 17:38:11,563 30954110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 17:38:16,017 30958564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:12:32,871 36615418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:12:37,465 36620012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:12:42,059 36624606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:13:40,451 36682999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:13:44,952 36687499ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 19:13:49,375 36691922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 21:46:25,590 45848137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 21:46:30,231 45852778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-05 21:46:34,794 45857341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 08:33:54,674 4849771ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 09:24:43,437 7898534ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 09:44:15,911 9071008ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 09:52:02,715 9537812ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:01:54,036 10129133ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:01:58,459 10133555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:02:02,818 10137915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:03:14,309 10209405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:03:18,716 10213813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 10:03:23,138 10218235ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:12:11,300 14346397ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:16:23,373 14598470ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:52:46,208 16781305ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:52:50,544 16785640ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:52:54,889 16789986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:56:10,702 16985799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:56:15,139 16990236ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 11:56:19,562 16994659ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 12:51:43,917 20319014ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 13:23:51,857 22246954ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 13:23:56,264 22251361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 13:24:00,655 22255752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 13:52:21,020 23956117ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-06 13:55:11,405 24126502ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 14:17:18,191 25453288ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 15:51:03,666 31078763ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 15:52:32,963 31168060ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 17:29:04,977 36960074ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 17:31:36,444 37111541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 17:31:40,976 37116072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 17:31:45,539 37120635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 17:49:46,173 38201270ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:11:59,600 39534696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:12:04,069 39539165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:12:08,491 39543588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:31:51,893 40726990ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:31:56,551 40731648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:32:01,098 40736195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:32:44,837 40779934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:32:49,431 40784528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 18:32:54,041 40789138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:01:16,054 46091151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:01:20,696 46095793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:01:25,335 46100432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:18:40,438 47135534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:18:45,048 47140144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:18:49,657 47144754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:26:48,917 47624014ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 20:40:39,132 48454229ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-06 23:25:50,187 58365284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 23:25:56,705 58371802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-06 23:26:03,318 58378415ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 08:23:35,062 90630159ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 08:55:05,660 92520757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 08:55:10,096 92525193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 08:55:14,534 92529631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:20:48,422 97663519ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:20:52,969 97668066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:20:57,346 97672443ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:25:48,314 97963410ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:45:21,145 99136242ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:45:26,833 99141930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:45:31,240 99146337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 10:50:59,831 99474928ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 11:05:33,527 100348624ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 13:45:44,520 5556676ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 13:45:46,223 5558378ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 14:28:48,671 8140826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 14:28:53,046 8145201ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 14:28:57,453 8149608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:34:53,241 15705396ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:34:57,678 15709833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:35:02,053 15714209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:43:42,240 16234395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:43:48,803 16240958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 16:43:55,319 16247475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 18:42:57,276 23389431ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 18:45:51,637 23563793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 18:45:56,075 23568230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 18:46:00,496 23572651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 19:11:53,468 25125624ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 19:49:10,675 27362830ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:12:50,637 28782793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:12:55,013 28787168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:12:59,365 28791520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:54:41,671 31293826ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:54:50,875 31303030ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 20:54:58,870 31311025ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-07 22:14:59,513 36111668ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 22:17:53,023 36285178ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 22:33:16,356 37208511ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:06:42,383 39214538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:06:46,805 39218960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:06:51,259 39223414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:21:50,175 40122331ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:21:54,674 40126829ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-07 23:21:59,098 40131253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 01:41:04,156 48476312ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 01:41:08,766 48480922ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 01:41:13,392 48485547ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:11:40,321 68312476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:11:44,695 68316850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:11:49,071 68321226ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:32:30,815 69562970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:32:35,330 69567486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:32:39,739 69571894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:54:28,326 70880481ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:54:32,717 70884872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 07:54:37,030 70889185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:22:56,132 76188287ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:23:03,070 76195225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:23:07,445 76199600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:28:23,090 76515245ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:28:27,497 76519652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:28:31,888 76524043ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 09:55:58,252 78170407ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 10:19:36,218 79588374ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:47:40,161 84872316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:47:44,568 84876723ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:47:49,006 84881161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:49:21,287 84973442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:49:25,662 84977817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 11:49:30,041 84982196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 12:03:25,865 85818020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 12:03:30,319 85822474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 12:03:34,663 85826819ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 12:13:00,890 86393045ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 12:13:10,937 86403093ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 13:27:47,867 90880023ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 13:27:52,258 90884414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 13:27:56,696 90888851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 14:56:17,667 96189822ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 14:56:49,187 96221342ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 14:58:48,094 96340249ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 15:14:40,735 97292890ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 16:45:59,989 102772144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 16:46:06,380 102778535ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 16:46:10,848 102783003ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 17:01:56,960 103729115ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 18:58:43,054 6324180ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 19:01:44,548 6505675ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 19:31:01,521 8262647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 19:31:07,927 8269054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 19:31:14,444 8275571ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 20:00:18,294 10019420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 21:21:48,690 14909817ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 21:32:56,892 15578018ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 21:58:02,159 17083285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 21:58:06,566 17087692ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 21:58:11,004 17092131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 22:47:02,320 20023447ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:07:38,561 21259688ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:07:43,031 21264157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:07:47,437 21268564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:07:54,594 21275721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:07:59,016 21280143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:08:03,454 21284581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:15:57,960 21759087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:16:02,336 21763462ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-08 23:16:06,742 21767869ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 05:55:37,607 45738734ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 05:56:09,720 45770846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 05:56:14,080 45775206ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 05:56:18,455 45779581ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 07:30:03,303 51404430ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 07:30:09,732 51410859ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 07:30:16,155 51417282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:24:04,108 54645234ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:24:11,530 54652657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:24:18,719 54659845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:52:35,812 56356939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:52:40,203 56361330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 08:52:44,532 56365658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:21:33,122 58094249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:21:37,575 58098702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:21:41,983 58103110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:23:08,643 58189770ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:34:32,526 58873652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:34:37,134 58878261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 09:34:41,744 58882871ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:00:47,067 60448193ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:02:44,217 60565344ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:08:04,032 60885159ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:08:11,299 60892425ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:08:17,783 60898910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 10:08:24,269 60905395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 11:51:56,852 67117979ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 11:52:03,197 67124323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 11:52:10,737 67131863ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:08:03,160 71684286ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:37:54,968 73476094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:38:01,389 73482516ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:38:07,858 73488985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:39:17,818 73558944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:39:24,194 73565320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 13:39:30,538 73571665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 14:52:03,445 77924572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 14:52:07,914 77929041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 14:52:12,305 77933432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 16:00:01,347 82002474ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:09:10,547 86151674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:09:14,985 86156111ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:09:19,407 86160534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:10:01,286 86202413ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:02,032 86503159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:06,439 86507565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:10,783 86511909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:48,661 86549788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:53,037 86554163ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:15:57,349 86558476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:26:56,364 87217491ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:27:00,818 87221945ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 17:27:05,209 87226335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:24:58,438 90699564ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:25:02,875 90704002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:25:07,300 90708426ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:49:07,484 92148611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:49:13,874 92155000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 18:49:20,344 92161471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:03:01,046 92982173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:03:05,484 92986611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:03:09,875 92991002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:34:57,777 94898904ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:36:47,585 95008712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:36:51,960 95013087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 19:36:56,384 95017510ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 20:00:23,959 96425085ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 20:00:28,397 96429524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 20:00:32,835 96433961ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 21:25:51,901 101553028ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-09 22:28:43,594 904126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 22:28:48,034 908566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 22:28:52,378 912910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 23:29:21,465 4541997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 23:29:26,073 4546605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-09 23:29:30,449 4550981ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 00:23:33,316 7793847ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 08:11:54,497 35895029ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 08:55:55,032 38535563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 08:55:59,439 38539970ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 08:56:03,830 38544362ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:04:05,173 39025704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:04:09,564 39030095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:04:17,127 39037658ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:25:17,447 40297978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:25:23,057 40303588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 09:25:27,696 40308228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 10:04:24,407 42644938ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 10:34:43,319 44463851ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-10 11:52:08,486 49109018ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-10 11:52:38,209 49138741ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-10 11:53:45,541 49206073ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-10 13:22:30,917 54531449ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 13:36:19,530 55360061ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 13:36:24,810 55365342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 13:36:29,217 55369749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 14:57:37,480 60238012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 14:57:44,449 60244981ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 14:57:51,419 60251951ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 16:28:56,674 65717206ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 19:01:53,897 74894428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 19:01:58,335 74898867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 19:02:02,773 74903304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-10 23:34:44,932 91265464ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 08:29:06,828 18927609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 08:29:11,288 18932070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 08:29:15,699 18936480ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:27:57,153 26057934ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:28:03,716 26064498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:28:10,217 26070998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:29:02,190 26122971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:29:08,597 26129378ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 10:29:15,066 26135847ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 13:12:21,593 35922374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 13:12:25,921 35926702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 13:12:31,589 35932370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 14:55:50,799 42131580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 14:55:55,189 42135971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 14:55:59,628 42140409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:28:32,886 54893668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:28:37,371 54898152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:28:41,762 54902544ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:30:30,387 55011169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:30:34,888 55015669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 18:30:39,248 55020029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 19:06:24,839 57165620ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 21:07:09,449 64410230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 21:07:15,888 64416669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-11 21:07:22,325 64423106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 09:39:53,572 5161258ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:01:03,896 6431583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:01:10,392 6438078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:01:16,710 6444397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:05:39,296 6706983ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:05:45,781 6713467ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:05:52,250 6719937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:10:55,619 7023305ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:10:59,978 7027665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 10:11:04,401 7032088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 11:00:30,896 9998582ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-12 11:00:35,177 10002864ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-12 11:01:09,650 10037336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 11:01:13,978 10041665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 11:01:18,338 10046025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 13:06:30,693 17558380ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 13:06:35,180 17562867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 13:06:39,631 17567318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:36:14,564 48142250ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:36:19,064 48146751ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:36:23,471 48151158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:39:11,502 48319189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:39:15,924 48323611ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 21:39:20,330 48328017ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:00,360 53468046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:06,814 53474500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:13,297 53480984ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:40,847 53508534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:47,441 53515128ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-12 23:05:53,864 53521551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:31:52,959 87480646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:31:58,507 87486193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:32:02,913 87490600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:35:39,229 87706916ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:37:34,186 87821873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:37:38,500 87826187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:37:42,860 87830546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:51:46,947 88674634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:51:53,167 88680853ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:51:59,464 88687151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:52:19,138 88706824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:52:26,732 88714419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:52:36,077 88723764ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:59:04,055 89111742ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:59:10,618 89118305ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:59:16,994 89124681ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:59:52,138 89159825ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 08:59:58,639 89166325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:00:05,030 89172717ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:10:36,405 89804092ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:10:42,843 89810530ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:10:49,188 89816874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:19:53,150 90360836ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:20:00,354 90368040ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:20:06,636 90374322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:20:21,278 90388964ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:47,097 90474784ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:50,364 90478050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:53,520 90481207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:54,755 90482441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:59,162 90486849ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:21:59,911 90487598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:22:15,116 90502803ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:30:19,325 90987012ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:56:22,008 92549695ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:56:26,430 92554117ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 09:56:30,837 92558524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:00:44,578 92812265ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:06:34,174 93161861ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:13:39,515 93587202ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:13:44,219 93591905ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:28:19,853 94467540ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:28:33,499 94481185ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:37:51,367 95039054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:37:55,851 95043538ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 10:38:00,164 95047851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 11:13:59,299 97206986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 11:14:05,752 97213439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 11:14:13,284 97220971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:38:34,172 102281858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:38:38,563 102286250ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:38:42,939 102290625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:39:57,128 102364815ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:40:01,519 102369205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:40:05,941 102373628ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:46:25,131 102752818ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:46:31,617 102759304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 12:46:37,914 102765600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:05:46,250 103913937ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:05:50,735 103918421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:05:55,125 103922812ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:53:15,098 2357325ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:53:19,535 2361762ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 13:53:23,895 2366122ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 14:38:11,147 5053374ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-13 14:58:37,406 6279633ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 14:58:41,845 6284072ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 14:58:46,283 6288509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:00:39,875 6402102ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:00:44,359 6406586ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:00:48,750 6410977ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:34:31,508 8433735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:34:38,009 8440236ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 15:34:45,041 8447268ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 16:40:52,987 12415214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 16:40:57,426 12419653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 16:41:01,831 12424058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 16:41:58,156 12480383ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 21:44:34,655 30636882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 21:44:39,187 30641414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 21:44:43,640 30645867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 22:16:01,796 32524023ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 22:16:08,437 32530664ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-13 22:16:14,953 32537180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 08:08:59,657 68101884ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 08:09:04,117 68106344ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 08:09:08,572 68110799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 08:20:01,079 68763306ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:03:23,883 71366110ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:30:02,128 72964355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:30:06,628 72968855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:30:11,023 72973250ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:56:52,618 74574845ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:56:59,088 74581315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 09:57:05,369 74587596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 10:30:57,056 76619283ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:04:04,540 78606767ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:05:34,828 78697055ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:18:39,742 79481969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:18:44,164 79486391ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:18:49,071 79491298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:30:46,306 80208533ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:30:50,682 80212909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:30:55,120 80217347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 11:44:45,100 81047327ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:05,555 89767782ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:12,774 89775001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:20,118 89782345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:45,262 89807489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:52,373 89814600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:10:59,560 89821787ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:12:35,271 89917498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:12:39,693 89921920ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:12:44,100 89926327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:25:46,911 90709138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:25:54,163 90716390ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:26:01,258 90723485ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:26:51,684 90773911ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:27:00,825 90783052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 14:27:07,981 90790208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 15:14:50,495 93652722ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-14 15:46:56,426 95578653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 15:47:00,832 95583059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 15:47:05,208 95587435ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 16:42:54,852 98937079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 16:42:59,274 98941501ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 16:43:03,650 98945877ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 17:16:22,312 100944539ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-14 17:16:26,250 100948477ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-14 18:57:15,493 2589012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 18:57:20,900 2594419ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 18:57:28,307 2601826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 19:25:47,437 4300957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 19:25:53,469 4306989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 19:25:57,938 4311457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 20:53:52,696 9586216ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 22:39:25,576 15919095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-14 22:40:09,611 15963131ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 06:48:52,158 45285677ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 06:48:59,206 45292725ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 06:49:06,285 45299804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 09:31:38,628 55052147ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-15 10:09:48,867 57342386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 10:09:53,430 57346949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 10:09:57,899 57351418ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 11:05:24,298 60677818ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-15 11:25:38,529 61892048ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 11:44:03,740 62997259ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 11:44:08,240 63001759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 11:44:12,631 63006151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 13:13:12,060 68345579ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 13:13:16,529 68350049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 13:13:20,936 68354455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 14:23:50,306 72583826ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 16:39:27,615 80721134ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 16:49:19,742 81313262ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 16:49:24,196 81317716ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 16:49:28,588 81322107ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 17:38:17,866 84251386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 17:38:22,303 84255822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 17:38:26,803 84260323ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 20:59:38,343 96331862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 20:59:42,927 96336447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 20:59:47,375 96340894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-15 22:38:23,420 102256940ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-16 00:53:14,460 5928989ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 01:16:10,614 7305144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 07:01:25,400 28019930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 07:01:29,995 28024524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 07:01:34,386 28028915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 08:04:28,447 31802976ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-16 09:04:19,857 35394386ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-16 09:51:58,039 38252568ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:04:59,500 39034030ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:46:31,629 41526159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:46:37,994 41532524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:46:44,271 41538801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:50:19,760 41754290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:50:26,136 41760665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 10:50:32,544 41767073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:05:36,131 42670661ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:23,292 44577822ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:27,683 44582212ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:32,114 44586643ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:38,631 44593161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:43,007 44597537ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 11:37:47,398 44601928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 12:20:16,847 47151376ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:38:39,262 51853792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:38:43,809 51858339ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:38:48,419 51862949ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:39:46,533 51921063ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:39:51,096 51925626ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 13:39:55,660 51930189ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:42:53,891 55708421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:42:58,267 55712796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:43:02,689 55717219ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:43:09,784 55724313ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:43:14,190 55728720ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:43:18,628 55733157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:29,530 55864060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:33,968 55868498ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:38,345 55872874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:45,412 55879942ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:49,829 55884358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:45:54,204 55888733ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:50:26,262 56160791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:50:30,668 56165198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 14:50:35,044 56169573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 15:02:39,777 56894307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 15:02:46,199 56900729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 15:02:52,435 56906964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:20:06,947 61541477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:20:13,429 61547958ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:20:19,789 61554318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:21:06,621 61601151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:21:12,997 61607526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:21:19,529 61614058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:43:27,686 62942215ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:43:32,108 62946638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 16:43:36,468 62950998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 17:31:39,272 65833801ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 17:59:41,852 67516381ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 19:08:11,647 71626176ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-16 21:15:48,281 79282811ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 00:17:48,632 90203162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 00:17:53,023 90207553ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 00:17:57,477 90212007ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 08:16:13,423 14461886ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 10:22:02,935 22011398ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 10:24:07,361 22135824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 10:24:13,065 22141528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 10:24:18,675 22147138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:01:56,017 24404480ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:18:03,175 25371638ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:26:30,846 25879309ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:52:55,205 27463668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:52:59,596 27468059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 11:53:04,065 27472528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 12:30:01,491 29689954ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 13:03:05,687 31674150ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 13:31:31,763 33380226ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 15:39:03,162 41031625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 15:39:07,631 41036094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 15:39:12,069 41040532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 15:45:56,274 41444737ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 17:12:36,399 46644862ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 17:12:47,087 46655550ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 18:28:06,272 51174735ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 19:13:11,423 53879886ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:26:31,776 58280239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:33:32,405 58700868ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:41:13,767 59162230ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:46:31,901 59480364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:46:36,354 59484817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:46:40,776 59489239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 20:51:46,148 59794611ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-17 21:05:08,844 60597308ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 21:05:13,220 60601683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 21:05:17,596 60606059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 23:55:11,100 70799563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 23:55:15,616 70804079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-17 23:55:20,116 70808579ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 06:57:08,431 96116894ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 06:57:13,666 96122129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 06:57:18,103 96126567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 09:05:04,484 103792947ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 09:05:08,968 103797431ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 09:05:13,469 103801932ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 10:52:05,199 5841584ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-18 11:05:48,723 6665107ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 18:02:38,701 31675086ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 20:00:37,100 38753484ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 20:00:43,741 38760125ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 20:00:50,225 38766610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:55:03,434 45619819ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:55:07,872 45624256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:55:12,496 45628881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:58:49,372 45845757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:58:53,920 45850304ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 21:58:58,403 45854788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 23:57:00,001 52936385ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 23:57:04,438 52940823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-18 23:57:08,892 52945277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:01:49,230 53225614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:01:58,808 53235193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:02:20,061 53256445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:02:28,811 53265196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:03:16,191 53312575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:03:20,691 53317076ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 00:03:25,129 53321513ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 08:43:24,990 84521375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 08:43:31,382 84527766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 08:43:37,898 84534282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 10:39:08,780 91465164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 10:39:15,421 91471806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 10:39:21,812 91478197ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:30:10,213 922732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:30:16,934 929453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:30:23,355 935873ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:25,942 1778461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:30,505 1783024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:35,068 1787587ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:43,522 1796041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:48,163 1800682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:44:52,773 1805292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:45:00,970 1813489ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:45:05,564 1818083ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 14:45:10,174 1822693ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 15:26:37,332 4309851ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:19:45,626 7498144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:19:52,157 7504676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:19:58,674 7511193ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:51:24,853 9397372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:51:29,494 9402013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 16:51:34,105 9406623ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 18:23:05,762 14898281ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 19:20:45,881 18358400ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 20:05:09,445 21021964ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-19 21:56:17,508 27690027ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 06:13:06,006 57498525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 06:13:10,584 57503103ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 06:13:15,069 57507588ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:40:10,182 66322701ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:58:30,594 67423113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:58:35,098 67427617ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:58:39,645 67432164ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:59:18,711 67471230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:59:23,196 67475714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 08:59:27,681 67480200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:01:48,441 67620959ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:01:52,972 67625491ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:01:57,457 67629976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:06:17,398 67889917ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:13:51,797 68344316ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:13:56,407 68348925ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:14:00,908 68353427ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:48:12,717 70405236ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:48:17,217 70409736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 09:48:21,687 70414205ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 11:23:26,325 76118844ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 11:37:57,661 76990180ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 11:38:02,116 76994634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 11:38:06,647 76999166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 13:16:15,486 82888005ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 14:03:45,973 85738492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 14:03:50,425 85742944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 14:03:54,817 85747336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 17:27:44,801 97977320ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-20 18:59:19,530 103472049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 18:59:23,984 103476503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 18:59:28,454 103480972ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:28:18,262 4400946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:28:27,107 4409790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:28:38,889 4421573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:29:03,422 4446106ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:29:12,720 4455403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 20:29:21,736 4464420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 22:00:46,049 9948733ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 23:37:38,126 15760809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 23:37:45,314 15767997ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-20 23:37:52,705 15775389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 08:28:02,611 47585295ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 10:22:59,294 54481978ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 10:23:03,700 54486383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 10:23:08,107 54490790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 12:05:02,675 60605359ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 12:56:51,140 63713823ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 14:21:15,733 68778417ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 14:21:26,016 68788700ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 14:21:43,894 68806578ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 15:40:42,010 73544693ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 15:40:45,276 73547959ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 15:44:31,650 73774334ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 16:48:48,428 77631112ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 16:48:51,710 77634393ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:04:45,529 82188213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:04:49,967 82192651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:04:54,436 82197120ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:21:13,117 83175801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:21:17,524 83180208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:21:21,899 83184583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 18:26:50,531 83513214ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 20:06:37,644 89500327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 20:06:42,362 89505045ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 20:06:46,753 89509436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 21:34:57,922 94800606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 21:35:04,548 94807231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 21:35:11,204 94813888ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 22:02:20,025 96442709ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-21 22:34:19,399 98362083ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 02:39:26,113 8647123ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 02:39:30,580 8651590ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 02:39:35,003 8656013ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 03:29:56,541 11677551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 03:30:01,181 11682190ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 03:30:05,634 11686644ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 07:46:26,538 27067548ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:08:48,912 28409922ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:42:44,627 30445637ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:42:49,081 30450091ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:42:53,502 30454511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:45:55,897 30636907ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:46:00,321 30641330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:46:04,727 30645737ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:48:00,205 30761214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:48:04,641 30765651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:48:09,048 30770058ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:49:55,308 30876318ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:49:59,717 30880727ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:50:04,157 30885167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:50:49,257 30930266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:50:53,678 30934687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:50:58,084 30939094ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:51:27,462 30968471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:51:31,887 30972896ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:51:36,494 30977504ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:52:14,122 31015132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:52:18,491 31019501ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 08:52:22,866 31023876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:09:33,291 32054301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:09:37,792 32058802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:09:42,191 32063201ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:10:20,916 32101926ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:10:25,338 32106348ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:10:29,776 32110786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:11:24,442 32165452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:11:31,411 32172421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 09:11:35,803 32176813ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 10:35:13,629 37194639ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 10:35:45,976 37226986ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 10:41:37,176 37578186ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 10:46:30,665 37871675ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 10:48:22,222 37983232ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:06:36,501 39077511ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:50:35,131 41716141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:50:41,569 41722578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:50:48,086 41729095ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:51:13,796 41754806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 11:51:20,283 41761293ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 12:03:39,960 42500970ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 13:42:28,521 48429531ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 14:20:16,881 50697890ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 14:58:08,088 52969098ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:11:33,941 53774950ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:12:29,851 53830860ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:14:54,606 53975615ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:34:18,467 55139477ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:34:22,936 55143946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 15:34:27,437 55148446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 16:05:08,142 56989151ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 16:05:10,548 56991558ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 17:30:38,132 62119141ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 17:30:42,615 62123625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 17:30:47,021 62128030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 18:19:03,591 65024601ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 18:19:08,092 65029101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-22 18:19:12,482 65033492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 05:57:24,292 1767464ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 06:36:45,618 4128790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 06:36:52,634 4135806ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 06:36:59,604 4142776ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 07:55:37,008 8860180ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:01:35,436 9218608ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:01:39,827 9222999ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:01:44,202 9227374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:52:51,997 12295169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:52:56,419 12299591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 08:53:00,856 12304028ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 09:23:26,058 14129230ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 09:40:46,432 15169604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 09:40:51,089 15174261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 09:40:55,731 15178903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 10:08:40,790 16843962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 10:08:47,728 16850900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 10:08:54,838 16858010ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 11:14:42,101 20805273ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 11:37:58,419 22201591ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 11:38:02,828 22206000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 11:38:07,248 22210420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 12:10:22,573 24145745ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 12:52:08,904 26652076ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 13:01:15,572 27198744ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 13:14:59,479 28022651ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 13:15:06,432 28029604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 13:15:13,667 28036839ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:26:31,036 35914208ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:29:24,676 36087848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:29:29,191 36092363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:29:33,738 36096910ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:29:56,599 36119771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:01,085 36124257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:05,633 36128805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:47,462 36170634ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:51,962 36175134ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:54,134 36177306ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:55,852 36179024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:30:57,994 36181166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:31:01,838 36185009ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:31:01,885 36185057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:31:06,371 36189543ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:31:10,856 36194027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:10,996 36254168ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:14,887 36258059ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:18,700 36261872ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:38,121 36281293ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:46,169 36289341ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:50,091 36293263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:32:54,622 36297794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:33:29,282 36332454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:33:33,814 36336986ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:33:38,360 36341532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:30,840 36394012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:35,727 36398899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:39,828 36403000ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:47,767 36410939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:52,376 36415548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:34:58,127 36421299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:35:49,850 36473022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:36:13,071 36496243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:36:17,540 36500712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:36:22,839 36506011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:36:26,793 36509965ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:36:31,339 36514511ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:37:03,914 36547086ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:39:41,180 36704352ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:39:45,727 36708899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:39:50,292 36713464ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:39:57,105 36720277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:40:01,637 36724809ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:42:10,195 36853367ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:42:13,288 36856460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:42:16,367 36859539ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:45:21,397 37044569ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:45:24,524 37047696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:45:27,632 37050804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:47:41,376 37184548ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:49:22,485 37285657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:49:26,970 37290142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:51:07,322 37390494ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:51:11,853 37395025ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:51:16,369 37399541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:51:29,853 37413025ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:52:26,859 37470031ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:52:37,358 37480530ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:52:41,858 37485030ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:52:46,359 37489531ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:54:15,309 37578481ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:54:51,187 37614359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:54:55,719 37618891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:55:01,016 37624188ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:56:20,746 37703918ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:56:28,997 37712169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:56:33,485 37716657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:56:37,966 37721138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:57:28,909 37772081ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:57:33,440 37776612ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:57:38,003 37781175ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:57:48,878 37792050ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 15:59:49,093 37912265ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:00:12,313 37935485ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:00:13,578 37936750ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:01:43,539 38026711ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:02:56,597 38099769ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:03:14,221 38117393ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:04:44,056 38207228ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:05:43,122 38266294ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:05:46,998 38270170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:05:50,998 38274170ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:06:14,986 38298158ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:06:18,955 38302127ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:06:23,189 38306361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:11,161 38354333ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:19,990 38363162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:24,459 38367631ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:24,474 38367646ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:29,038 38372210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:07:44,209 38387381ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:13:19,874 38723046ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 16:49:54,576 40917748ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-23 17:12:16,003 42259175ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 19:03:16,817 48919989ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 19:03:46,691 48949863ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 19:03:51,379 48954551ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:02:53,599 52496771ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:02:58,052 52501224ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:03:02,537 52505709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:12:12,348 53055520ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:12:19,725 53062897ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:12:28,398 53071570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:24:01,978 53765150ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:24:06,524 53769696ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 20:24:11,085 53774257ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 21:10:40,594 56563766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 21:10:44,985 56568157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-23 21:10:49,438 56572610ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 06:55:56,518 91679690ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 07:22:11,587 93254758ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-24 08:14:33,688 96396860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 08:14:38,095 96401267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 08:14:42,502 96405674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 09:25:33,676 100656848ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 09:29:31,204 100894376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 09:29:37,704 100900876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 09:29:44,264 100907436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:03:59,509 2167210ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:05:46,891 2274593ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:25:59,103 3486804ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:26:03,573 3491274ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:26:07,978 3495680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:45:40,191 4667892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:45:44,583 4672284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 11:45:49,051 4676753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 12:27:06,557 7154258ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 14:28:37,945 14445646ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 15:03:07,512 16515213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 15:03:11,965 16519667ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 15:03:20,465 16528166ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 15:06:37,001 16724702ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 16:11:38,128 20625830ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-24 16:44:14,653 22582354ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-24 16:44:29,388 22597090ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-24 17:53:44,967 26752668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 17:53:49,420 26757121ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 17:53:53,906 26761607ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 18:52:58,831 30306532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-24 21:01:46,659 38034361ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 08:54:37,826 80805527ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 08:55:23,407 80851109ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:17:04,196 89351898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:17:10,712 89358414ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:17:17,309 89365011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:18:15,718 89423420ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:18:28,485 89436187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 11:18:34,923 89442625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:32:52,918 93900619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:32:57,371 93905073ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:33:01,778 93909479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:41:28,368 94416069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:41:32,773 94420474ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 12:41:37,179 94424881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 14:50:52,557 102180258ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-25 14:51:04,136 102191837ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-25 15:03:52,829 102960530ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 15:04:26,005 102993707ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 15:51:08,911 1388342ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCHAN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.02, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:51:08,926 1388357ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCHAN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.02, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:51:53,571 1433002ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:51:53,585 1433017ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-25 15:55:01,688 1621120ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:HANSGN_27102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.2, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:55:01,690 1621121ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:HANSGN_27102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.2, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:55:09,423 1628855ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANDAD_27102025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 12.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:55:09,423 1628855ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNCXR_12112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.09, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:55:09,424 1628856ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNCXR_12112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.09, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:55:09,424 1628856ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANDAD_27102025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 12.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:55:20,505 1639936ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:55:20,505 1639936ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:57:12,703 1752134ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNVCS_01112025_VCSSGN_01112025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:57:12,703 1752134ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNVCS_01112025_VCSSGN_01112025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:57:25,611 1765043ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNTHD_12022026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 16.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:57:25,611 1765043ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNTHD_12022026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 16.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:57:28,674 1768106ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:57:28,674 1768106ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:57:32,190 1771622ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:SAILON_26102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 32.68, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:57:32,190 1771622ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:SAILON_26102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 32.68, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 15:57:33,033 1772464ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNCXR_25102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.39, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 15:57:33,033 1772464ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNCXR_25102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.39, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 16:00:25,889 1945321ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DINHAN_27102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.47, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 16:00:25,889 1945321ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DINHAN_27102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.47, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-25 16:03:03,200 2102632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-25 16:04:16,833 2176264ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 16:04:16,833 2176264ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-25 16:04:16,833 2176264ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 2s ago, v: 2.9.25.3041, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 8, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 7, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.91, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 16:04:16,833 2176264ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 2s ago, v: 2.9.25.3041, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 8, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 7, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.91, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 2s ago, v: 2.9.25.3041
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-25 16:04:49,257 2208688ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 13, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Flushed, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 0.75, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=10,Free=990,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-25 16:04:49,257 2208688ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 13, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Flushed, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 0.75, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=10,Free=990,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-25 17:34:18,791 7578222ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 09:14:05,028 63964459ms Service                MoveNext           - Running time: 2-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-10-26 09:52:40,619 66280050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 09:52:45,057 66284488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 09:52:49,432 66288864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 21:06:01,334 21997775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 21:06:07,896 22004337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 21:06:14,334 22010775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 22:40:42,160 27678601ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 22:41:17,972 27714413ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 22:41:39,896 27736337ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-26 22:50:30,715 28267157ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 01:27:57,115 37713557ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 01:35:13,251 38149692ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:11:44,790 61941232ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:13:10,283 62026725ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:33:40,082 63256524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:33:47,193 63263635ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:33:54,287 63270728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:34:41,744 63318185ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:34:48,995 63325436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:59:48,995 64825436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 08:59:55,449 64831890ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:00:01,824 64838266ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:00:32,500 64868941ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:00:38,938 64875379ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:00:47,438 64883880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:27:12,692 66469133ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:27:26,068 66482510ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:28:29,246 66545687ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 09:58:48,269 68364710ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 10:33:49,173 70465615ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 10:58:00,514 71916955ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 11:09:42,929 72619370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 11:09:47,414 72623856ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 11:09:51,837 72628278ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 11:26:23,607 73620048ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 12:36:05,134 77801576ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:07:36,445 83292887ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:07:38,836 83295277ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:07:41,430 83297871ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:08:13,933 83330374ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:08:57,687 83374128ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:09:28,049 83404490ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:54:31,002 86107444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:54:35,440 86111882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:54:39,800 86116241ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:55:26,836 86163277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:55:31,211 86167652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 14:55:35,696 86172137ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 15:33:30,731 88447172ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 15:55:20,707 89757149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 15:55:25,223 89761664ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 15:55:29,615 89766056ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 15:56:05,500 89801941ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 16:43:11,155 92627596ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 16:47:20,663 92877104ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-27 18:21:25,876 98522317ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 19:37:35,122 103091563ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 19:37:41,560 103098001ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 19:37:48,248 103104689ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 19:52:38,451 103994892ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 21:45:03,020 6343277ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 22:45:07,601 9947858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 22:45:12,008 9952265ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-27 22:45:16,367 9956625ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 08:54:00,847 46481104ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 09:12:22,367 47582625ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 09:17:29,538 47889795ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 09:17:53,322 47913579ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 09:59:52,605 50432862ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 10:11:19,229 51119487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 10:11:23,636 51123893ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 10:11:28,011 51128269ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:00:27,748 54068005ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:27:04,077 55664334ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:30:07,990 55848248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:30:12,365 55852623ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:30:16,709 55856966ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 11:31:35,638 55935895ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:21:23,144 58923401ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNBKK_06122025_BKKSGN_07122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.61, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:23,144 58923401ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNBKK_06122025_BKKSGN_07122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.61, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:21:34,567 58934824ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 3.84, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:34,567 58934824ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 3.84, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-28 12:21:37,973 58938231ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCSGN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 14.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:37,973 58938231ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCSGN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 14.5, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:21:39,677 58939934ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:HANSGN_01112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.84, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:39,677 58939934ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:HANSGN_01112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.84, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:21:40,568 58940825ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:THDDLI_05122025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.78, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:40,568 58940825ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:THDDLI_05122025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.78, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:21:45,021 58945279ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00020:SGNSIN_13112025_SINSGN_28112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 37.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:45,021 58945279ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00020:SGNSIN_13112025_SINSGN_28112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 37.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:21:54,913 58955170ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: PING, inst: 0, qu: 0, qs: 3, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.67, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:21:54,913 58955170ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: PING, inst: 0, qu: 0, qs: 3, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.67, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:22:09,868 58970125ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHUI_02012026_HUISGN_02012026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.61, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:22:09,868 58970125ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHUI_02012026_HUISGN_02012026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.61, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:28,203 59228461ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:BMVHPH_07112025_HPHBMV_07112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.58, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:28,203 59228461ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:BMVHPH_07112025_HPHBMV_07112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.58, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:29,156 59229414ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:BMVHPH_08112025_HPHBMV_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.49, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:29,156 59229414ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:BMVHPH_08112025_HPHBMV_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.49, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:32,078 59232336ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:HANICN_12112025_ICNHAN_12122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:32,078 59232336ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:HANICN_12112025_ICNHAN_12122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:45,329 59245587ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 5.67, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:45,329 59245587ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 5.67, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: UnableToConnect on prod01.redis.bookingticket.vn:6379/Interactive, Initializing/NotStarted, last: NONE, origin: BeginConnectAsync, outstanding: 0, last-read: 5s ago, last-write: 5s ago, keep-alive: 60s, state: Connecting, mgr: 10 of 10 available, last-heartbeat: never, global: 0s ago, v: 2.9.25.3041
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:49,750 59250008ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:49,751 59250009ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:56,361 59256619ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:56,361 59256619ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:26:58,174 59258432ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 4, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.24, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:26:58,174 59258432ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 4, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.24, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:27:05,597 59265854ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 1.48, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:27:05,597 59265854ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 1.48, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:27:10,034 59270292ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), inst: 0, qu: 0, qs: 1, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 4.56, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:27:10,034 59270292ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), inst: 0, qu: 0, qs: 1, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 4.56, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:29:36,771 59417029ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00123:SGNDAD_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.36, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:29:36,771 59417029ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00123:SGNDAD_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.36, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:29:44,304 59424561ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_10112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.58, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:29:44,304 59424561ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_10112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.58, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:29:54,164 59434422ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:29:54,164 59434422ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:02,711 59442968ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PXUHAN_29102025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.46, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:02,711 59442968ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PXUHAN_29102025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.46, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:04,180 59444437ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANDAD_26032026_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.75, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:04,180 59444437ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANDAD_26032026_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.75, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:05,430 59445688ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:HANICN_12112025_ICNHAN_12122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 20.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:05,430 59445688ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:HANICN_12112025_ICNHAN_12122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 20.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:09,368 59449625ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_19112025_HANSGN_23112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:09,368 59449625ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_19112025_HANSGN_23112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 14, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 21.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:10,039 59450297ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 12.95, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:10,039 59450297ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 12.95, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:10,649 59450907ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.86, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:10,649 59450907ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.86, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:21,713 59461970ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_31102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.42, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:21,713 59461970ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_31102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.42, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:22,697 59462954ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:22,697 59462954ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:25,463 59465720ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDLI_14112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.78, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:25,463 59465720ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDLI_14112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.78, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:30:25,684 59465942ms RedisService           GetValue           - Error getting value in Redis: Timeout performing GET (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:30:25,684 59465942ms RedisService           GetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing GET (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-28 12:32:48,335 59608593ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCHPH_11112025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.55, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:32:48,335 59608593ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PQCHPH_11112025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.55, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:32:49,710 59609968ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_29112025_THDSGN_07122025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.99, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=1,Free=32766,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:32:49,710 59609968ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_29112025_THDSGN_07122025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.99, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=1,Free=32766,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:32:51,210 59611468ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:DADSGN_28102025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.95, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:32:51,210 59611468ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:DADSGN_28102025_200, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.95, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:32:56,102 59616359ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PXUHAN_05112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.6, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:32:56,102 59616359ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PXUHAN_05112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.6, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:09,508 59629765ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNVDH_28102025_VDHSGN_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.01, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:09,509 59629767ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00158:SGNVDH_28102025_VDHSGN_29102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.01, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:14,383 59634641ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.25, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=1,Free=32766,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:14,385 59634642ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.25, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=1,Free=32766,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:19,479 59639736ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDAD_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.69, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:19,479 59639736ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDAD_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.69, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:20,073 59640330ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_23122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.81, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:20,073 59640330ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_23122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.81, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:22,870 59643127ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 15.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:22,870 59643127ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 15.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:28,089 59648347ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHPH_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.53, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:28,089 59648347ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHPH_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.53, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:32,699 59652956ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PERHAN_07122025_HANPER_31012026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.81, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:32,699 59652956ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:PERHAN_07122025_HANPER_31012026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.81, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:36,089 59656347ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:SGNHPH_07112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:36,089 59656347ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:SGNHPH_07112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:33:44,278 59664536ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_31102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:33:44,278 59664536ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_31102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:36:49,341 59849599ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:37:53,629 59913887ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDAD_04012026_201, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.92, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:37:53,629 59913887ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNDAD_04012026_201, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.92, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:05,771 59926028ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.36, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:05,771 59926028ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_28102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.36, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:11,959 59932217ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:11,959 59932217ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNHAN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.05, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:16,928 59937186ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:ICNSGN_08022026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.09, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:16,928 59937186ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:ICNSGN_08022026_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.09, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:18,288 59938545ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_22122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.87, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:18,288 59938545ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNTHD_22122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.87, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:23,553 59943811ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:SGNDLI_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.72, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=2,Free=32765,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:23,553 59943811ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:SGNDLI_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.72, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=2,Free=32765,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:26,383 59946640ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANPXU_12112025_PXUHAN_12112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.02, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:26,383 59946640ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANPXU_12112025_PXUHAN_12112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.02, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:38:33,476 59953733ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:DLIHAN_26112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.48, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:38:33,477 59953734ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:DLIHAN_26112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 10.48, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:01,828 60042086ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:SGNHPH_07112025_HPHSGN_09112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.92, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:01,828 60042086ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:SGNHPH_07112025_HPHSGN_09112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.92, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=3,Free=997,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:12,204 60052462ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.31, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:12,204 60052462ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 8.31, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:20,471 60060728ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:UIHSGN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.16, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:20,471 60060728ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00130:UIHSGN_30102025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 11.16, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:32,785 60073042ms RedisService           GetValue           - Error getting value in Redis: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNPQC_29102025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 33589, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 5.63, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:32,785 60073042ms RedisService           GetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNPQC_29102025_300, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 33589, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 5.63, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-28 12:40:33,050 60073308ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:33,050 60073308ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: INFO, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 16, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 9.3, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:39,973 60080231ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:39,973 60080231ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:41,504 60081762ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:41,504 60081762ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=5,Free=995,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:44,659 60084917ms RedisService           GetValue           - Error getting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:44,660 60084918ms RedisService           GetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=GET, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Initializing, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=6,Free=994,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-10-28 12:40:48,456 60088714ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 2.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:48,458 60088715ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 13, aw: False, bw: SpinningDown, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 2.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=4,Free=996,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:55,646 60095903ms RedisService           SetValue           - Error setting value in Redis: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=8,Free=992,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:55,646 60095903ms RedisService           SetValue           - StackExchange.Redis.RedisConnectionException: The message timed out in the backlog attempting to send because no connection became available (5000ms) - Last Connection Exception: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout, command=SETEX, timeout: 5000, inst: 0, qu: 1, qs: 0, aw: False, bw: SpinningDown, rs: NotStarted, ws: Idle, in: 0, last-in: 0, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: n/a, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=8,Free=992,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts) ---> StackExchange.Redis.RedisConnectionException: It was not possible to connect to the redis server(s) prod01.redis.bookingticket.vn:6379/Interactive. ConnectTimeout
   --- End of inner exception stack trace ---
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:55,786 60096043ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANPQC_03122025_PQCHAN_07122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.45, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:55,786 60096043ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00150:HANPQC_03122025_PQCHAN_07122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 13.45, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=7,Free=993,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:40:57,505 60097763ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNVCL_03012026_201, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 17.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=8,Free=992,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-10-28 12:40:57,505 60097763ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00118:SGNVCL_03012026_201, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 17.8, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=8,Free=992,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 12:41:59,495 60159753ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:42:03,871 60164128ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:42:08,246 60168503ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:43:20,502 60240760ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 12:48:26,413 60546670ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-28 14:11:37,445 65537703ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 14:37:45,365 67105622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 14:37:49,834 67110092ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 14:37:54,194 67114451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 15:43:09,661 71029919ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-10-28 15:43:09,661 71029919ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 16:25:25,648 73565906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 16:25:32,070 73572328ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 16:25:38,509 73578766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 17:19:49,967 76830225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 17:19:54,404 76834662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 17:19:58,796 76839053ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 18:18:06,907 80327164ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 18:49:12,823 82193081ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 19:57:12,064 86272322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 19:57:16,471 86276729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 19:57:20,940 86281198ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 20:35:24,758 88565015ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 22:10:26,051 94266309ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 22:18:00,894 94721152ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-28 22:30:27,320 95467577ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-10-28 22:30:27,320 95467577ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 22:30:34,790 95475047ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-10-28 22:30:34,790 95475047ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 22:30:37,570 95477827ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-10-28 22:30:37,570 95477827ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-28 22:30:37,601 95477858ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-10-28 22:30:37,601 95477858ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-10-29 09:26:04,958 30354695ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 11:20:56,818 37246555ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 11:21:03,209 37252946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 11:21:09,444 37259181ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 11:22:42,920 37352657ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-29 12:07:59,736 40069473ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 12:08:04,207 40073944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 12:08:08,551 40078288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 13:05:06,593 43496330ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 15:03:26,185 50595922ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 15:04:06,687 50636424ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 15:04:36,143 50665880ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 16:54:11,759 57241496ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:22:13,551 58923288ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:22:20,036 58929773ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:22:26,552 58936289ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:23:17,699 58987436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:23:24,137 58993874ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:23:31,294 59001031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:23:57,843 59027580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:24:04,234 59033971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:24:15,051 59044788ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:29:40,859 59370596ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 17:50:22,974 60612711ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 20:46:43,635 71193372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 20:47:09,143 71218880ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 20:47:14,425 71224162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 21:12:05,209 72714946ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 21:48:39,473 74909210ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-29 22:03:44,867 75814604ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:07:20,282 83230019ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:07:26,954 83236691ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:07:33,922 83243659ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:09:57,341 83387078ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:10:03,843 83393580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 00:10:10,281 83400018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 04:55:31,047 100520784ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 06:59:31,573 3571397ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 06:59:36,058 3575882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 06:59:40,495 3580320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:00:08,966 3608790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:00:13,451 3613275ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:00:17,842 3617666ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:26:37,189 5197013ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:44:43,887 6283711ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:45:25,460 6325285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:45:31,742 6331566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:45:37,976 6337801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 07:51:02,120 6661945ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:16:40,775 8200599ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:25:58,483 8758307ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:26:02,874 8762698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:26:07,249 8767074ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:27:45,195 8865020ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:27:49,586 8869411ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:27:53,915 8873739ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:28:28,418 8908243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:28:32,778 8912602ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:28:37,200 8917024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:29:07,672 8947496ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:29:12,094 8951919ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:29:16,485 8956309ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 08:55:16,666 10516490ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 09:33:16,312 12796137ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:11:47,604 15107428ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:41:12,087 16871912ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:46:51,866 17211691ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:49:16,026 17355850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:49:20,401 17360225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 10:49:24,808 17364632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 11:05:11,273 18311098ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 12:23:34,188 23014012ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 13:07:02,532 25622356ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 14:21:38,610 30098434ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 14:22:29,697 30149522ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 14:33:09,113 30788937ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 14:51:57,156 31916981ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 15:39:11,476 34751301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 15:39:15,852 34755676ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 15:39:20,227 34760051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 15:54:54,699 35694524ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 16:30:40,392 37840216ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 16:30:46,200 37846024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 16:30:50,622 37850446ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:04:21,471 43461295ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:04:27,971 43467796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:04:34,894 43474718ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:41:05,726 45665550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:41:14,414 45674238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:41:21,430 45681255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 18:57:21,466 46641290ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 19:08:21,348 47301172ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 19:49:26,844 49766669ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 19:49:29,053 49768877ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 21:09:39,579 54579403ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 21:10:12,302 54612126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:08:36,099 58115923ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:08:40,569 58120394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:08:44,991 58124816ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:09:21,041 58160865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:09:25,510 58165334ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 22:09:29,885 58169710ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-30 23:44:12,238 63852063ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 23:44:39,304 63879129ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-30 23:45:50,857 63950681ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-31 08:24:44,314 95084138ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 08:30:36,344 95436169ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:11:55,077 97914902ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:13:10,194 97990018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:13:37,148 98016973ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:14:04,557 98044382ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:14:37,717 98077541ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 09:15:42,801 98142625ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 10:50:27,297 103827121ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 11:15:56,259 968857ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 12:37:03,423 5836021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 12:37:07,814 5840412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 12:37:12,189 5844787ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 14:39:23,218 13175817ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 15:03:34,438 14627036ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:07:15,256 18447854ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:34:57,005 20109603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:35:01,694 20114292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:35:06,290 20118888ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:35:15,976 20128574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:35:20,617 20133215ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:35:25,243 20137841ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:38:30,369 20322967ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:38:36,807 20329405ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 16:38:43,338 20335936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 17:11:22,086 22294684ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 17:38:17,198 23909796ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 17:57:17,775 25050374ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-10-31 20:32:17,126 34349724ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-10-31 21:55:34,148 39346746ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-01 07:24:05,729 73458327ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 07:24:12,105 73464703ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 07:24:18,418 73471016ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 09:44:32,011 81884609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 09:44:36,370 81888969ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 09:44:40,761 81893359ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 10:19:11,228 83963827ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 11:31:07,619 88280217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 11:31:14,557 88287155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 11:31:21,589 88294187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:18:41,359 98333957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:18:48,484 98341082ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:18:55,547 98348145ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:32:09,150 99141749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:32:15,588 99148187ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 14:32:22,011 99154609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 16:06:16,284 379494ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 16:09:14,864 558073ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 16:10:35,401 638611ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 17:28:35,034 5318243ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-01 20:49:28,881 17372091ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 21:42:13,459 20536669ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 21:42:17,819 20541029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 21:42:22,273 20545482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:43:18,752 24201962ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:43:25,175 24208384ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:43:31,598 24214807ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:47:39,340 24462550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:47:45,857 24469066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-01 22:47:52,279 24475488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 08:11:40,968 58304178ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-02 08:11:40,968 58304178ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-02 09:16:12,374 62175583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 11:07:09,154 68832364ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 12:39:17,909 74361119ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 12:39:24,331 74367541ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 12:39:35,551 74378761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:09,689 91032899ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:14,096 91037306ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:19,519 91042728ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:37,161 91060371ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:41,567 91064777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:17:45,943 91069152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:19:23,019 91166229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:19:29,397 91172606ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:19:35,788 91178998ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:04,765 91267974ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:11,234 91274444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:17,672 91280882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:37,467 91300677ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:41,858 91305068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:46,327 91309537ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:21:57,391 91320600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:22:01,766 91324976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:22:06,111 91329320ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:25:54,160 91557370ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:25:58,567 91561777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:26:02,958 91566167ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:26:39,477 91602687ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:26:43,938 91607147ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 17:26:48,822 91612032ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 18:06:11,222 93974432ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 18:06:15,613 93978823ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 18:06:20,004 93983214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-02 20:15:51,666 101754875ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:13:13,420 36782469ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:13:17,890 36786939ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:13:22,281 36791330ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:18:52,972 37122022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:18:57,394 37126444ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 07:19:01,801 37130850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 09:25:22,365 44711414ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 09:27:12,721 44821770ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 09:31:56,357 45105407ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 09:53:17,857 46386906ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 10:55:53,616 50142665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 10:55:57,991 50147041ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 10:56:02,352 50151401ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:10:02,261 50991310ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:10:06,668 50995717ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:10:11,075 51000124ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:38:20,672 52689721ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:38:25,048 52694097ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 11:38:29,517 52698566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 16:29:17,353 70146402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 16:29:21,728 70150777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 16:29:26,135 70155184ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-03 21:48:06,136 89275185ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 05:50:47,702 13813993ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 05:50:52,156 13818447ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 05:50:56,547 13822838ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 06:22:33,024 15719315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 06:22:37,383 15723674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 06:22:42,727 15729018ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 07:49:19,364 20925655ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:37:03,645 23789936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:37:09,990 23796281ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:37:16,287 23802578ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:44:34,503 24240794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:44:40,926 24247217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 08:44:47,347 24253638ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:07:18,457 25604748ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:07:27,927 25614218ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:07:35,177 25621468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:19:28,103 26334394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:19:34,463 26340754ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:19:40,761 26347052ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:39:49,905 27556196ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 09:51:14,098 28240389ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 10:00:42,870 28809161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 10:00:49,245 28815536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 10:00:55,481 28821772ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 10:46:07,270 31533561ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 11:25:00,438 33866729ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 11:26:54,186 33980477ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 12:29:48,802 37755093ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 14:10:30,785 43797076ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-04 14:12:37,279 43923570ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-04 14:26:06,426 44732717ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-04 15:05:04,018 47070309ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 16:00:00,498 50366789ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 16:42:24,788 52911079ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 16:53:53,479 53599770ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 16:54:00,370 53606661ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 16:54:06,964 53613255ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 17:03:57,049 54203340ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 17:07:27,377 54413668ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 17:18:04,390 55050681ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 19:03:51,563 61397854ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 19:03:55,939 61402230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 19:04:00,377 61406668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 19:35:01,796 63268087ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 20:38:43,533 67089824ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 20:41:33,359 67259650ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:33:09,607 70355898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:33:14,045 70360336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:33:18,514 70364805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:36:48,489 70574780ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:48:54,860 71301151ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:49:01,986 71308277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 21:49:09,174 71315465ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 22:13:06,885 72753176ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 22:13:11,339 72757630ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-04 22:13:15,714 72762005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:23:38,163 80584454ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:23:42,600 80588891ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:23:47,007 80593298ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:25:14,999 80681290ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:25:19,470 80685761ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 00:25:23,922 80690213ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 10:35:55,703 12927658ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 11:25:03,433 15875387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 11:25:07,814 15879768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 11:25:12,241 15884196ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:00:06,783 21578738ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:20:00,900 22772855ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:20:07,292 22779247ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:20:13,713 22785668ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:56:57,178 24989133ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:57:03,676 24995631ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 13:57:10,178 25002133ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 14:26:29,401 26761356ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 14:26:33,808 26765763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 14:26:38,200 26770154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 15:10:08,730 29380684ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 15:10:13,214 29385169ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 15:10:17,625 29389580ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 15:39:11,667 31123622ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:11,683 31123638ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:12,902 31124857ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:12,902 31124857ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:12,964 31124919ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:12,964 31124919ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:13,324 31125278ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:13,324 31125278ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:13,870 31125825ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:13,870 31125825ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:16,183 31128138ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:16,183 31128138ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:16,481 31128435ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:16,481 31128435ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:22,043 31133998ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:22,043 31133998ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:23,184 31135139ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:23,200 31135154ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:24,622 31136577ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:24,622 31136577ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:24,747 31136702ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:24,747 31136702ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:26,716 31138670ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:26,716 31138670ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:28,185 31140140ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:28,185 31140140ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:28,294 31140249ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:28,294 31140249ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:30,825 31142780ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:30,825 31142780ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:31,904 31143859ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:31,904 31143859ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:33,092 31145047ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:33,092 31145047ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:33,436 31145391ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:33,452 31145407ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 15:39:33,717 31145672ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-05 15:39:33,717 31145672ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-05 16:53:50,862 35602817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 16:53:55,302 35607256ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 16:53:59,739 35611694ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:06:53,072 36385026ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:06:54,134 36386089ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:06:58,400 36390355ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:07:30,078 36422033ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:55:21,746 39293701ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 17:55:50,951 39322906ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 18:01:48,189 39680144ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 18:41:21,764 42053719ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-05 19:07:30,266 43622221ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 19:58:39,910 46691865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 19:58:44,348 46696303ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 19:58:48,911 46700866ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 21:18:20,742 51472697ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 21:21:44,005 51675959ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 21:55:29,072 53701027ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 21:55:33,480 53705434ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 21:55:37,949 53709903ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-05 23:35:48,192 59720146ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 00:07:20,193 61612148ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 00:14:18,330 62030285ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 06:46:26,875 85558830ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 08:19:55,927 91167882ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 08:20:00,364 91172319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 08:20:06,114 91178069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 08:57:47,786 93439740ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:12:24,727 97916682ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:23:05,822 98557777ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:29:09,663 98921617ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:37:28,561 99420516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:44:47,825 99859779ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:45:47,009 99918964ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 10:52:27,611 100319566ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 11:07:37,264 101229218ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 11:07:56,189 101248143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 12:46:25,875 2749050ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 12:52:20,140 3103315ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 12:52:26,249 3109424ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 12:52:30,656 3113831ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:16:58,882 4582057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:58:25,473 7068648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:58:29,895 7073071ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:58:34,286 7077461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:59:42,231 7145406ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:59:49,560 7152735ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 13:59:53,904 7157079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 14:17:25,374 8208550ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 14:53:05,526 10348701ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 15:20:56,310 12019486ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 15:21:00,765 12023940ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 15:21:05,185 12028361ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 15:35:07,649 12870824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:04:49,880 14653055ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:04:56,349 14659524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:05:02,771 14665946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:06:07,846 14731021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:06:14,206 14737381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:06:21,535 14744710ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:10:43,339 15006514ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:10:49,744 15012919ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:10:56,151 15019326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:17:12,320 15395495ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:19:04,518 15507693ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 16:31:50,697 16273873ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 17:09:03,276 18506451ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 17:09:09,761 18512936ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 17:09:16,262 18519437ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:09:45,580 25748756ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:09:50,003 25753178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:09:54,394 25757570ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:18:34,281 26277456ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:18:38,829 26282004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 19:18:43,376 26286551ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 20:24:00,760 30203935ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 20:44:56,362 31459537ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 20:45:00,909 31464084ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 20:45:05,253 31468428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 21:11:15,283 33038458ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 21:43:40,548 34983723ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 21:48:43,966 35287141ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 22:07:46,755 36429930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 22:07:53,319 36436494ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-06 22:07:59,615 36442790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 01:18:46,522 47889697ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 08:13:41,439 72784614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 08:13:45,893 72789068ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 08:13:50,253 72793428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 09:34:42,017 77645192ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 09:59:36,398 79139573ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 09:59:40,820 79143995ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 09:59:45,211 79148386ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 10:46:33,315 81956490ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 11:09:52,116 83355291ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 11:20:22,301 83985476ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 11:20:26,926 83990102ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 11:20:31,489 83994665ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 13:46:47,498 92770673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 14:32:40,350 95523525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 14:39:08,553 95911728ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 15:30:40,358 99003533ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 19:28:06,824 8841327ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:06,873 8841376ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:28:09,123 8843626ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:09,123 8843626ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:28:11,581 8846084ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:11,581 8846084ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:28:12,733 8847236ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:12,733 8847236ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:28:13,311 8847814ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:13,311 8847814ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:28:22,812 8857315ms RedisService           SetValue           - Error setting value in Redis: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
ERROR 2025-11-07 19:28:22,827 8857331ms RedisService           SetValue           - StackExchange.Redis.RedisServerException: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:33:09,149 9143652ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00170:SGNHAN_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 20.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-07 19:33:09,150 9143654ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00170:SGNHAN_08112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 20.19, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=2,Free=998,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 19:33:11,291 9145794ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00170:HANDAD_15122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 14.22, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-07 19:33:11,291 9145794ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00170:HANDAD_15122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 14.22, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-07 20:11:26,361 11440864ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:11:30,844 11445347ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:11:35,344 11449848ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:23:38,047 12172550ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:23:42,562 12177066ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:23:46,985 12181488ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:25:04,320 12258824ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:25:08,774 12263277ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:25:13,196 12267700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:34:06,010 12800513ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-07 20:50:14,481 13768984ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 07:36:45,788 52560291ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 07:36:50,226 52564729ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 07:36:54,554 52569057ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 08:35:48,511 56103015ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 08:58:20,967 57455470ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 09:01:40,390 57654893ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 09:02:01,908 57676411ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 09:02:12,549 57687052ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 10:33:38,717 63173221ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 10:46:03,080 63917583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 10:46:07,486 63921989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 10:46:11,847 63926350ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 11:23:33,733 66168236ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 11:35:39,202 66893705ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 11:50:59,090 67813593ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:14:02,597 72797100ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:14:07,071 72801574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:14:11,493 72805996ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:22:52,299 73326802ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:22:53,314 73327817ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:22:59,815 73334319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 13:23:07,430 73341933ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 14:20:43,248 76797752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 14:20:47,780 76802283ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 14:20:52,171 76806674ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:09:42,948 83337452ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:09:47,402 83341905ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:09:51,918 83346421ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:27:54,018 84428522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:27:58,488 84432991ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 16:28:03,113 84437616ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 17:32:56,177 88330680ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 17:33:00,646 88335149ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-08 17:33:05,100 88339603ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 08:18:47,548 37062989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 08:18:54,144 37069586ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 08:19:01,409 37076851ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:48:13,133 74828575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:48:20,212 74835654ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:48:34,930 74850372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:49:26,390 74901832ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:49:33,391 74908833ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:49:40,563 74916004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:50:05,019 74940460ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:50:11,894 74947336ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:50:18,989 74954430ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:51:01,086 74996528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:51:08,179 75003621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-09 18:51:15,352 75010794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:39:40,946 23900087ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:39:45,661 23904802ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:39:50,161 23909302ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:45:13,472 24232613ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:46:26,579 24305720ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:55:38,368 24857509ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:55:45,556 24864697ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 09:55:52,557 24871698ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:00:41,419 25160559ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:02:40,002 25279143ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:02:46,346 25285487ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:02:52,659 25291800ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:03:50,645 25349786ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:03:57,084 25356225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:04:03,507 25362648ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 10:09:38,839 25697980ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-10 11:15:26,097 29645238ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 11:15:32,503 29651644ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 11:15:38,861 29658002ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 13:51:37,217 39016358ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 13:51:41,639 39020780ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 13:51:45,982 39025123ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 13:57:38,922 39378063ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 14:02:13,686 39652827ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 15:33:37,116 45136257ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 16:07:04,955 47144096ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 16:07:09,349 47148490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 16:07:13,910 47153051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 17:49:48,141 53307282ms RedisService           GetValue           - Error getting value in Redis: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00020:SGNHAN_13112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 4389, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.23, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-10 17:49:48,141 53307282ms RedisService           GetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00020:SGNHAN_13112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 4389, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.23, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-11-10 17:56:54,148 53733289ms RedisService           GetValue           - Error getting value in Redis: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DADSGN_11112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 5848, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.98, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-10 17:56:54,148 53733289ms RedisService           GetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing GET (5000ms), next: GET VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DADSGN_11112025_100, inst: 0, qu: 0, qs: 2, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 4, cur-in: 5848, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 6.98, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisBase.ExecuteSync[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at StackExchange.Redis.RedisDatabase.StringGet(RedisKey key, CommandFlags flags)
   at VietnamAirlines.Api.Helpers.RedisService.GetValue(String key, Func`1 defaultValueFunc)
ERROR 2025-11-10 17:57:36,724 53775865ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 17:57:41,272 53780412ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 17:57:45,694 53784835ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:13:15,846 54714986ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:13:18,018 54717159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:13:24,424 54723565ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:13:30,846 54729987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:13:32,221 54731362ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:14:53,910 54813051ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:15:19,912 54839053ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:15:34,007 54853148ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:15:40,383 54859524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:15:46,819 54865960ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:16:52,889 54932030ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:22:07,202 55246343ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 18:22:40,783 55279924ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 19:06:53,408 57932549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 19:06:57,893 57937034ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 19:07:02,253 57941394ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 20:21:40,928 62420069ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 20:22:15,561 62454702ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 20:30:34,481 62953622ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 21:40:58,354 67177495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 21:41:02,964 67182105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 21:41:07,448 67186589ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 21:46:43,181 67522322ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 22:20:23,735 69542876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 22:20:28,204 69547345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 22:20:32,611 69551752ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 23:06:32,107 72311248ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 23:06:39,529 72318670ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-10 23:07:02,001 72341142ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 07:54:19,300 103978441ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 07:54:27,254 103986395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 07:54:35,317 103994458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:16:56,609 939392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:17:04,733 947516ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:17:12,749 955532ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:22:30,204 1272987ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:22:37,345 1280128ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 08:22:44,329 1287113ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:39:40,817 5903600ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:39:45,536 5908319ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:39:50,349 5913132ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:41:45,476 6028259ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:42:35,236 6078019ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:43:12,755 6115538ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 09:43:19,240 6122023ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 10:54:50,735 10413518ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 13:49:11,227 20874011ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 13:49:28,994 20891777ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 13:49:30,901 20893684ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:11:54,935 22237718ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:12:00,452 22243235ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:12:06,562 22249345ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:13:39,519 22342303ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:13:44,348 22347131ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:15:21,779 22444562ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:17:20,350 22563133ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:19:11,838 22674621ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:19:24,199 22686982ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:23:26,610 22929393ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 14:26:14,024 23096807ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:16:28,306 26111089ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:17:15,700 26158484ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:22:05,191 26447974ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:23:18,401 26521184ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:56:42,907 28525690ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:56:49,376 28532159ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 15:56:55,877 28538660ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 16:11:57,425 29440208ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 16:12:01,926 29444709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 16:12:06,379 29449162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 16:42:06,264 31249047ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 16:53:47,228 31950011ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 17:31:27,695 34210478ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 18:53:09,556 39112339ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 18:53:21,900 39124683ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-11 20:46:09,920 45892703ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-11 21:35:31,375 48854158ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DADHAN_17112025_HANDAD_22112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 15.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-11 21:35:31,390 48854173ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:DADHAN_17112025_HANDAD_22112025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 15.27, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-11 22:34:54,753 52417536ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 00:22:01,357 58844140ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 10:27:23,715 95166499ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 11:01:14,305 97197088ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 11:27:47,323 98790106ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 12:03:31,930 100934713ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 14:24:56,438 5008382ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 14:27:56,706 5188650ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:22:38,998 15670943ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:47:25,955 17157900ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:47:30,317 17162261ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:47:34,739 17166683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:49:17,813 17269757ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:49:22,217 17274161ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 17:49:26,562 17278506ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 20:15:52,787 26064732ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 20:15:57,397 26069342ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 20:16:01,913 26073858ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 21:48:42,443 31634387ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 21:48:48,850 31640794ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 21:48:55,319 31647263ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 22:53:25,097 35517041ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 22:54:59,059 35611004ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:13:51,161 36743105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:13:57,630 36749574ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:14:04,077 36756022ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:33:08,587 37900531ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:33:13,400 37905344ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:34:56,597 38008542ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-12 23:42:05,219 38437164ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:16:30,631 65702575ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:16:35,116 65707060ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:16:39,538 65711482ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:38:37,550 67029495ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:38:43,847 67035791ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:38:50,191 67042135ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:42:23,134 67255079ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:42:29,557 67261501ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 07:42:35,918 67267862ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 09:57:33,808 75365752ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 10:02:34,429 75666374ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 10:02:38,883 75670827ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 10:02:43,258 75675202ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 10:57:05,927 78937871ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:22:24,279 80456223ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:22:28,670 80460614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:22:33,202 80465146ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:26:37,285 80709230ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:26:41,956 80713901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:26:47,265 80719209ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:28:07,265 80799210ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:28:13,157 80805101ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 11:28:18,610 80810554ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 12:20:22,551 83934495ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-13 13:17:50,513 87382457ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 13:17:55,091 87387036ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 13:17:59,514 87391458ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 14:44:52,285 92604229ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 15:16:23,917 94495861ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 15:16:28,292 94500236ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 15:16:32,675 94504619ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 15:22:00,131 94832075ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 16:56:01,277 100473221ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 16:56:17,653 100489598ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 16:56:23,185 100495129ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 17:36:04,527 102876471ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 17:36:08,964 102880909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 17:36:13,309 102885253ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 17:46:06,759 103478704ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 18:27:08,236 1534428ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 18:27:12,668 1538860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 18:27:17,059 1543251ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 20:12:05,683 7831875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-13 21:02:13,470 10839662ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 01:38:49,390 27435582ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 01:38:53,813 27440005ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 01:38:58,250 27444442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 10:29:19,723 59265914ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 10:29:24,192 59270384ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 10:29:28,552 59274744ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 11:28:08,057 62794249ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 12:47:38,175 67564366ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 13:51:09,348 71375540ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 13:51:15,709 71381901ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 13:51:22,100 71388292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 14:58:24,070 75410262ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 15:00:53,487 75559679ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-14 15:51:33,845 78600037ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 15:51:38,408 78604599ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 15:51:42,971 78609162ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 15:57:33,493 78959685ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-14 18:30:04,463 88110655ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 18:30:08,823 88115015ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 18:30:13,216 88119408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:28:32,545 91618737ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:29:01,907 91648099ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:29:06,392 91652584ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:29:10,924 91657116ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:48:19,576 92805768ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:48:24,857 92811049ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 19:48:30,107 92816299ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 20:57:22,604 96948795ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 21:08:03,986 97590178ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 21:16:35,700 98101892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-14 21:32:59,486 99085678ms Service                MoveNext           - Running time: 34-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-11-14 22:13:15,400 101501592ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:19:55,688 33492989ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:20:00,190 33497490ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:20:04,549 33501850ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:46:05,809 35063110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:46:12,076 35069376ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 08:46:18,413 35075714ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 09:16:51,546 36908846ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 09:17:48,140 36965440ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 09:44:57,616 38594917ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 10:14:56,352 40393652ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 10:15:00,774 40398075ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 10:15:05,181 40402481ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 11:57:58,940 46576241ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 11:58:17,801 46595102ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 13:27:34,058 51951359ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 13:29:18,818 52056118ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:46:24,215 56681515ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:46:28,684 56685985ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:46:33,060 56690360ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:55:00,174 57197475ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:55:04,581 57201881ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:55:08,924 57206225ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:58:46,083 57423383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:58:50,474 57427775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 14:58:54,837 57432138ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 16:17:38,767 62156067ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 16:22:48,943 62466243ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 16:22:53,350 62470650ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 16:22:57,711 62475011ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 17:54:54,229 67991530ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 18:36:12,491 70469792ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 18:36:19,054 70476355ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 18:36:28,430 70485731ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-15 21:57:36,428 82553729ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 00:16:25,408 90882709ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:32:28,354 19800596ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:32:34,824 19807065ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:32:41,151 19813392ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:53:51,765 21084006ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:53:56,220 21088461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 09:54:00,642 21092883ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 17:51:34,081 49746322ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 17:51:40,363 49752604ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 17:51:46,676 49758917ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 18:19:05,812 51398053ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 18:19:10,281 51402522ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 18:19:14,688 51406929ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-16 22:30:29,287 66481528ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 08:17:44,867 101717108ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 11:01:27,068 7158867ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 11:01:31,694 7163492ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 11:01:36,194 7167992ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 11:03:57,933 7309731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 15:52:47,469 24639267ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 15:52:54,743 24646542ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 15:53:01,779 24653577ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 16:28:37,408 26789207ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 16:28:41,830 26793629ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 16:28:46,253 26798051ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 17:31:17,622 30549420ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 20:29:34,028 41245826ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 20:29:40,638 41252436ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 20:29:47,233 41259031ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:01:55,951 43187749ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:02:00,419 43192217ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:02:04,811 43196609ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:48:59,494 46011292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:49:03,979 46015778ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:49:08,433 46020231ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:49:34,997 46046795ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-17 21:49:37,013 46048811ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 01:13:44,179 58295977ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 08:36:52,936 84884734ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 09:35:53,973 88425771ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:35:36,499 92008298ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:46:10,894 92642692ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:48:43,178 92794976ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:52:06,698 92998497ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:52:10,670 93002468ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:52:14,702 93006500ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:52:16,155 93007953ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:53:21,072 93072870ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:53:25,526 93077324ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 10:53:29,901 93081700ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 13:45:07,003 103378801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 13:45:11,394 103383192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 13:45:15,816 103387614ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:18:48,966 994711ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:19:56,503 1062248ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:25:42,519 1408264ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:37:38,410 2124154ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:37:42,783 2128528ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:37:47,347 2133091ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:40:08,358 2274103ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 14:40:10,390 2276135ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 15:00:59,147 3524892ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 16:07:01,962 7487706ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 16:32:09,183 8994927ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 16:32:10,261 8996006ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 16:39:50,017 9455762ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 17:05:51,804 11017549ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 17:05:56,226 11021971ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 17:06:00,664 11026409ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 18:58:24,751 17770496ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:34:15,846 19921591ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:34:49,833 19955578ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:37:25,581 20111326ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:39:04,447 20210192ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:39:12,773 20218518ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 19:39:36,494 20242239ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 21:22:17,360 26403105ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 22:39:40,938 31046683ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 22:39:45,407 31051152ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-18 22:39:49,783 31055527ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:21,058 38466803ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:25,621 38471366ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:30,153 38475898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:38,700 38484445ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:43,310 38489055ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 00:43:47,904 38493649ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 09:50:59,272 71325017ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 10:20:18,719 73084464ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-19 10:24:02,692 73308437ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 10:25:19,149 73384894ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 10:26:27,221 73452966ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 11:11:30,124 76155868ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-19 11:31:11,673 77337417ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 11:37:55,734 77741479ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 11:38:00,141 77745885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 11:38:04,485 77750229ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 13:02:46,422 82832167ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:00:52,844 93518589ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:33:00,173 95445917ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:35:59,547 95625292ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:36:03,909 95629653ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:36:08,284 95634029ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:36:30,800 95656545ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 16:48:27,784 96373529ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 17:05:54,341 97420086ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-19 21:00:51,283 7110312ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 05:46:31,236 38650265ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-20 09:21:42,203 51561232ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-20 09:42:13,497 52792526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 09:42:17,899 52796928ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 09:42:22,352 52801381ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 11:28:00,885 59139914ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 11:28:05,322 59144351ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 11:28:09,697 59148727ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 11:49:07,077 60406107ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:53:04,429 64243459ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:53:08,992 64248021ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:53:13,554 64252583ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:53:56,381 64295410ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:54:00,975 64300004ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 12:54:05,538 64304567ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 13:26:53,145 66272174ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 14:03:27,017 68466046ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 14:03:31,471 68470500ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 14:03:35,924 68474953ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 15:39:25,839 74224868ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 15:39:30,277 74229306ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 15:39:34,730 74233759ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 15:46:58,937 74677966ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 15:48:28,804 74767833ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 16:31:31,366 77350395ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 18:25:14,036 84173065ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:07:09,789 90288818ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:44:57,558 92556587ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:27,795 92586824ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:51,234 92610263ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:52,969 92611998ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:54,234 92613263ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:56,001 92615030ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:56,923 92615952ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:45:58,345 92617374ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:46:10,505 92629535ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:46:11,818 92630847ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:46:12,833 92631862ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:46:28,599 92647628ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:46:30,709 92649738ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:48:48,893 92787922ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:48:50,549 92789578ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:48:51,580 92790609ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-20 20:49:04,301 92803330ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 08:42:31,718 31198732ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:41:33,749 34740763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:41:38,141 34745155ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:41:42,532 34749546ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:51:06,916 35313930ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:51:11,369 35318383ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 09:51:15,791 35322805ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 10:59:21,394 39408408ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 12:39:50,930 45437944ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 12:49:09,272 45996286ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 13:53:55,748 49882762ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-21 13:53:59,308 49886322ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-21 13:54:52,172 49939186ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-21 15:48:37,930 56764944ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 15:48:42,321 56769335ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 15:48:46,759 56773773ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:41:10,776 59917790ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:41:15,151 59922165ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:41:19,591 59926605ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:46:54,200 60261214ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:47:00,607 60267621ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:47:07,250 60274264ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:52:16,104 60583118ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:52:20,510 60587524ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 16:52:24,901 60591915ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 18:11:46,440 65353453ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 18:11:50,878 65357892ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 18:11:55,270 65362284ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:00:50,884 68297898ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:00:55,323 68302337ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:00:59,698 68306712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:34:25,112 70312126ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:34:29,441 70316455ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 19:34:33,894 70320908ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-21 20:27:55,978 73522992ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 10:33:52,776 19861077ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 10:36:48,854 20037155ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 10:55:56,032 21184333ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 14:04:14,498 32482799ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 14:04:19,107 32487408ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 14:04:23,468 32491769ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:36:00,218 45188519ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:36:06,656 45194957ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:36:11,094 45199395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:38:32,559 45340860ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:38:37,013 45345314ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:38:41,404 45349705ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:56:19,981 46408282ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:56:24,482 46412783ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:56:29,138 46417439ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:58:20,711 46529012ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:58:25,071 46533372ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 17:58:29,462 46537763ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 19:41:06,928 52695229ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-22 19:41:10,632 52698933ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-22 20:48:10,575 56718876ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 20:48:17,545 56725846ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-22 20:48:24,608 56732909ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 08:05:30,219 97358520ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-23 08:13:12,642 97820943ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 13:31:26,939 12516775ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 13:31:31,393 12521228ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 13:31:35,737 12525572ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:05:41,466 25371301ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:05:45,827 25375662ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:05:50,218 25380054ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:40:45,510 27475345ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:40:49,900 27479736ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 17:40:54,261 27484096ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:03:18,226 28828062ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:03:22,632 28832468ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:03:27,040 28836875ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:18:32,252 29742088ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:18:36,690 29746525ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 18:18:41,049 29750885ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 19:43:48,303 34858139ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 19:43:52,691 34862526ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 19:43:57,146 34866982ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 21:00:17,863 39447699ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 21:00:34,912 39464747ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 21:01:31,180 39521016ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 21:12:56,494 40206329ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-23 21:13:33,419 40243255ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 09:51:41,708 85731543ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 09:52:01,788 85751623ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 09:52:28,979 85778814ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 09:52:53,011 85802847ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 10:39:44,887 88614722ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-24 12:46:12,140 96201976ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 12:46:18,625 96208461ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 12:46:25,110 96214946ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:08:29,246 333331ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:25:38,988 1363072ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:25:41,426 1365510ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:27:02,830 1446914ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:27:07,237 1451321ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:27:11,628 1455712ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:28:05,953 1510038ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:29:20,819 1584904ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:29:25,195 1589279ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:29:29,617 1593701ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:34:57,666 1921751ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:35:02,073 1926157ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 15:35:06,450 1930534ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 16:12:50,605 4194689ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 16:41:20,452 5904536ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 16:41:24,843 5908927ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 16:41:29,189 5913273ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:01:31,111 7115195ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:18:06,563 8110647ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:18:10,939 8115024ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:18:15,353 8119438ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:57:03,572 10447657ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:57:08,026 10452110ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 17:57:12,495 10456579ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 18:04:25,290 10889375ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 18:04:29,681 10893766ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 18:04:34,088 10898173ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 19:26:53,525 15837610ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 20:46:43,279 20627363ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 20:46:47,717 20631801ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 20:46:52,092 20636177ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-24 23:24:00,112 30064197ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 07:39:46,317 59810402ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 07:39:50,708 59814793ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 07:39:55,115 59819200ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 08:36:19,110 63203195ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 08:36:25,548 63209632ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 08:36:31,986 63216070ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 09:11:02,358 65286442ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 09:11:08,859 65292943ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 09:11:15,311 65299395ms Service                PriceQuote         - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.ServiceLibrary.Service.PriceQuote(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 09:57:33,652 68077737ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 09:57:35,482 68079566ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 10:01:44,431 68328516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 10:30:33,521 70057605ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 13:34:59,972 9180678ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-25 13:39:53,368 9474074ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 15:37:32,879 16533585ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 15:38:12,540 16573246ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-25 21:40:48,356 5852731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 10:22:20,880 51545255ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 11:48:55,585 56739960ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 12:57:00,293 60824668ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 13:04:16,031 61260406ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 13:07:09,015 61433390ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 14:38:41,910 66926285ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 15:01:17,393 68281768ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-26 15:01:21,893 68286268ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-26 15:48:55,267 71139642ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 15:56:28,835 71593210ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 16:00:14,644 71819019ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 16:20:01,407 73005782ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 17:06:06,414 75770789ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 18:03:31,164 79215539ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 19:05:53,529 82957904ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-26 20:27:46,027 87870402ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 20:29:20,998 87965373ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 20:31:14,696 88079071ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-26 20:33:01,221 88185596ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 06:08:23,849 18263742ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 09:41:51,098 31070992ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 09:48:15,463 31455357ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 10:05:44,587 32504481ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-27 12:35:22,794 41482687ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 14:24:37,531 48037425ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 14:56:19,762 49939656ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 15:16:53,438 51173331ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-27 15:20:49,010 51408904ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-27 18:27:40,223 62620116ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:19:11,380 11747614ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:22:46,652 11962886ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:38:01,963 12878198ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:46:45,016 13401251ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:50:56,650 13652884ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:51:37,451 13693685ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 09:52:24,392 13740626ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 10:05:35,911 14532145ms Service                MoveNext           - Running time: 2-System.ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length
   at System.String.Substring(Int32 startIndex, Int32 length)
   at VietnamAirlines.Api.Rest.RestRQFactory.ProcessPassengerLongName(VNABookingRecord bookingRecord)
   at VietnamAirlines.Api.Rest.RestRQFactory.CreateBookFlightReq(IConfigProvider configProvider, SharedContext sharedContext, VNABookingRecord bookingRecord, String verifySession)
   at VietnamAirlines.Api.Rest.Controller.<BookFlight>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-11-28 10:07:03,549 14619783ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 11:23:35,033 19211267ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-28 11:38:52,841 20129076ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-28 11:38:57,608 20133842ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-28 16:05:57,091 36153325ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 10:10:07,767 101204001ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-29 10:10:14,627 101210861ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-11-29 10:21:55,926 101912160ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 10:38:22,326 102898560ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 10:39:07,190 102943424ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 11:45:24,545 2509563ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 12:06:31,897 3776915ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 15:17:44,409 15249428ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 15:36:07,490 16352508ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 19:51:35,616 31680635ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-29 19:51:45,477 31690495ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 00:09:31,860 47156878ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 09:24:57,764 80482783ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 09:56:15,537 82360556ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 09:59:04,637 82529656ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 09:59:42,715 82567734ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 12:57:10,449 93215468ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 12:57:44,687 93249706ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 13:01:44,047 93489065ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 13:47:23,978 96228996ms RedisService           SetValue           - Error setting value in Redis: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:SGNDAD_01122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
ERROR 2025-11-30 13:47:23,978 96228996ms RedisService           SetValue           - StackExchange.Redis.RedisTimeoutException: Timeout performing SETEX (5000ms), next: SETEX VNAAPI_COMMAND:SEARCH_FLIGHT:VNA00119:SGNDAD_01122025_100, inst: 0, qu: 0, qs: 1, aw: False, bw: Inactive, rs: ReadAsync, ws: Idle, in: 0, in-pipe: 0, out-pipe: 0, last-in: 314, cur-in: 0, sync-ops: 1, async-ops: 0, serverEndpoint: prod01.redis.bookingticket.vn:6379, conn-sec: 7.7, aoc: 0, mc: 1/1/0, mgr: 10 of 10 available, clientName: 21518705-01(SE.Redis-v2.9.25.3041), IOCP: (Busy=1,Free=999,Min=6,Max=1000), WORKER: (Busy=0,Free=32767,Min=6,Max=32767), v: 2.9.25.3041 (Please take a look at this article for some common client-side issues that can cause timeouts: https://stackexchange.github.io/StackExchange.Redis/Timeouts)
   at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server, T defaultValue)
   at VietnamAirlines.Api.Helpers.RedisService.SetValue(String key, String value, Nullable`1 expiry)
ERROR 2025-11-30 15:31:13,074 102458093ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 15:45:16,955 103301974ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 20:31:44,655 16079242ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-11-30 20:31:49,702 16084289ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 09:04:12,087 61226674ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 09:16:16,355 61950941ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 09:47:03,412 63797999ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 09:55:54,321 64328908ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 13:01:22,441 75457028ms Service                MoveNext           - Running time: 2-System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
   at VietnamAirlines.Api.Rest.Workflow.<MakeReservation>d__11.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.Api.VietnamAirlinesCommand.<MakeReservation>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at VietnamAirlines.ServiceLibrary.Service.<MakeReservation>d__4.MoveNext()
ERROR 2025-12-01 13:19:48,676 76563263ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 14:30:50,811 80825398ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 14:30:54,437 80829023ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 14:38:09,081 81263668ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 15:01:55,717 82690304ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 15:02:00,869 82695456ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 15:02:15,652 82710239ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 16:10:20,238 86794824ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 20:17:16,754 101611340ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 20:17:20,958 101615544ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-01 20:40:37,982 103012569ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-01 21:21:07,845 1032220ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 08:09:45,823 39950198ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-02 08:09:54,246 39958621ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-02 08:26:23,226 40947601ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 14:41:27,276 63451651ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 14:42:36,110 63520485ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 14:42:38,298 63522673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 17:55:58,651 75123026ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 17:56:40,659 75165034ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 17:57:14,553 75198928ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 19:27:14,203 80598578ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 20:07:54,816 83039191ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 20:52:50,869 85735244ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-02 22:33:07,385 91751760ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 07:46:22,788 20440026ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 09:30:15,790 26673028ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 09:46:21,433 27638671ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 09:49:26,528 27823766ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 10:10:26,560 29083798ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 10:11:14,081 29131319ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 11:21:39,672 33356910ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 11:44:36,198 34733436ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 11:44:42,261 34739499ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 12:00:27,141 35684379ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 14:34:12,110 44909348ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 14:39:11,628 45208866ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 14:57:02,171 46279409ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 17:58:09,953 57147191ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 18:12:57,544 58034782ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 18:20:02,518 58459756ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 18:21:49,326 58566564ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-03 19:54:20,694 64117932ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 19:55:20,934 64178172ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 20:04:26,321 64723559ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-03 21:52:48,603 71225841ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 08:39:01,223 5688774ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-04 09:11:26,501 7634052ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 10:39:38,657 12926208ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 10:48:27,475 13455026ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-04 13:34:51,616 23439167ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-04 14:07:53,971 25421522ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-04 14:33:41,330 26968881ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 16:11:21,247 2537950ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 16:43:48,631 4485334ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-04 16:50:49,100 4905804ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 17:23:49,789 6886492ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-04 18:59:52,569 12649273ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 10:22:43,965 68020669ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 11:13:23,825 71060529ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 11:13:36,687 71073391ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 11:14:05,891 71102595ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:14:12,042 589414ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:14:14,496 591867ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:19:05,743 883114ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:19:36,481 913853ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:19:46,904 924276ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 12:19:49,872 927243ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 13:36:48,811 5546182ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 14:05:29,029 7266400ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 14:21:07,009 8204380ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 14:29:32,732 8710104ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-05 15:12:32,403 11289775ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 15:13:44,417 11361789ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 17:55:11,679 21049051ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 19:28:20,810 26638182ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 21:46:05,605 34902976ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-05 21:46:34,139 34931510ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-06 08:44:51,411 74428782ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-06 10:36:38,593 81135965ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-06 10:38:03,866 81221238ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-06 11:00:37,694 82575066ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-06 14:33:36,292 95353663ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-06 15:03:24,158 97141530ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-07 02:23:08,003 33517767ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-07 14:30:00,315 77130079ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-07 14:37:45,966 77595731ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-07 15:58:36,011 82445776ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-07 21:25:26,237 102056001ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 10:43:19,365 45512357ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 11:04:27,146 46780138ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 11:06:03,918 46876909ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 12:41:53,648 52626639ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 13:36:19,896 55892887ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 13:37:48,635 55981626ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 13:37:51,948 55984940ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 13:38:19,903 56012894ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 16:11:44,444 65217436ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 16:18:48,907 65641899ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 16:20:33,839 65746830ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 20:44:08,181 2491153ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 20:46:17,974 2620946ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 20:46:40,524 2643496ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-08 21:28:30,861 5153833ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 00:05:58,180 14601152ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 00:06:20,510 14623482ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 05:34:21,228 8899767ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 08:14:34,808 18513346ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 08:15:41,627 18580165ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 08:16:24,099 18622637ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 08:23:53,726 19072265ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 09:01:19,720 21318258ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 10:45:39,892 27578431ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 11:35:11,174 30549713ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 12:23:15,000 33433538ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 12:23:31,314 33449852ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 12:23:40,456 33458994ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:06:55,206 43253745ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:06:56,889 43255427ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:07:29,991 43288529ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:07:53,368 43311906ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:23:43,786 44262324ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 15:26:58,803 44457341ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 16:36:23,170 2529143ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:32:29,581 5895554ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:32:34,519 5900492ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:32:50,552 5916525ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:32:55,037 5921010ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:33:10,959 5936932ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-09 17:34:02,355 5988328ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 19:10:53,070 11799044ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 21:11:10,606 19016579ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 21:11:13,340 19019313ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 21:11:16,700 19022673ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-09 22:18:45,301 23071274ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:35:04,739 56450713ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:35:07,943 56453917ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:37:01,676 56567649ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:37:55,447 56621421ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:38:36,543 56662516ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 07:38:41,903 56667876ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:05:38,254 38050ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:08:30,660 210456ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:08:49,052 228848ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:19:20,569 860364ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:19:41,320 881116ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:34:03,488 1743284ms Service                PricingNonBooking  - System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at VietnamAirlines.ServiceLibrary.Service.PricingNonBooking(VNAPricingNonBookingCriteria criteria, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:42:03,800 2223596ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:48:54,444 2634240ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 08:59:34,719 3274515ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 09:14:55,125 4194921ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 09:15:22,635 4222430ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)
ERROR 2025-12-10 09:15:46,442 4246238ms Service                GetReservation     - System.NullReferenceException: Object reference not set to an instance of an object.
   at VietnamAirlines.Api.Configuration.VietnamAirlineConfigProvider..ctor(String username, String password, String privateKey, String iata, String ipAddress, String currencyCode, String language)
   at VietnamAirlines.Api.VietnamAirlinesCommand..ctor(String username, String password, String privateKey, String iata)
   at VietnamAirlines.ServiceLibrary.Service.GetReservation(String recordLocation, VNASecureMessage secureMessage)