Release Notes

Release Notes - .NET FIX Engine - Version 1.19.0

Admin — Fri, 17 Apr 2026 12:30:18 GMT

[NETCOREFIXENGINE-1951] - Possible data race in AsyncFileBasedStorage
[NETCOREFIXENGINE-1945] - Repeated EngineSettings.LoadFromConfigurationFile duplicate list-backed settings
[NETCOREFIXENGINE-1944] - Session.ValidateUnknownFields returns the state of ValidateRequiredFields instead of ValidateUnknownFields
[NETCOREFIXENGINE-1545] - The required group inside the non-required component is treated as required

[NETCOREFIXENGINE-1947] - Improve the generation of V50SP2Latest dictionary
[NETCOREFIXENGINE-1943] - Update the "Time Zone" article on the "Session Schedule" page
[NETCOREFIXENGINE-1937] - Mark Session.StorageDirectory setter as Obsolete
[NETCOREFIXENGINE-1936] - Mark Session.ResendingQueueSize setter as Obsolete
[NETCOREFIXENGINE-1935] - Mark EngineSettings session global properties as Obsolete
[NETCOREFIXENGINE-1918] - Add Group.Set(int tag, int index, ...) methods for unsigned values
[NETCOREFIXENGINE-1874] - Add the High Availability section to the Programming Guide
[NETCOREFIXENGINE-1799] - Add SessionSettings class to specify session-related parameters during session construction
[NETCOREFIXENGINE-1585] - Send Logout if no Heartbeat is received after TestRequest

[NETCOREFIXENGINE-1907] - Add EngineSettings.LoadFromConfigurationStream(..) method
[NETCOREFIXENGINE-1703] - Add SessionScheduler.Register(Session session, string scheduleId, SessionConnectionSettings connectionSettings) method

Admin — Mon, 13 Apr 2026 09:08:46 GMT

Admin — Fri, 10 Apr 2026 13:54:12 GMT

[CPPEEMDIRDI-1123] - Fix processing of ProductSnapshot messages without Feeds group

Admin — Wed, 08 Apr 2026 19:13:24 GMT

Admin — Wed, 08 Apr 2026 17:53:15 GMT

Admin — Tue, 07 Apr 2026 20:56:39 GMT

[JCMEMDH-814] - Unnecessary CPU overhead when processing book types with no registered listeners
[JCMEMDH-813] - Eliminate hot-path overhead when packet logging is disabled

Admin — Tue, 07 Apr 2026 10:06:44 GMT

Admin — Mon, 06 Apr 2026 17:50:16 GMT

Update details: OnixS FIX Support Pack update for ICE Trading - update for FIX API specification <4.23>

Admin — Mon, 06 Apr 2026 10:35:41 GMT

Admin — Thu, 02 Apr 2026 13:54:10 GMT