OnixS .NET Framework FIX Engine logs its data into the FixEngineLog.txt file that is located in the MsgStorage subfolder of the folder in which OnixS .NET Framework FIX Engine assembly resides.

For each FIX session with file-based session storage the following files are also created in the MsgStorage folder:

• SESSION_NAME.summary – contains both inbound and outbound FIX messages.
• SESSION_NAME.state - contains session state-related data.

SESSION_NAME is formed on the base of SenderCompID, TargetCompID, session's FIX Version and a timestamp. During the run-time, it's available via StorageID property.

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