Monitoring & Troubleshooting

Use the FIXSIM dashboard and logs to quickly diagnose connectivity and message-flow issues.

Common issues

• Logon rejected – verify SenderCompID, TargetCompID, and credentials.
• Sequence mismatch – engine restarted with lower sequence numbers.
• No connectivity – firewall or routing issues to FIXSIM endpoints.

Reset sequence numbers

ResetSeqNumFlag=Y

Apply a reset when you intentionally restart your engine and want to realign sequence numbers with FIXSIM.