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Informix Error -3999: System internal error in file filename at line number.

Cause and resolution

System internal error in file filename at line number.

This error should not occur. If the error recurs, note all circumstances and contact IBM Informix Technical Support.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-3999 is a catch-all internal error — per the official guidance, this error should not occur, with no further diagnostic detail beyond the source file and line number it names.

  1. An internal condition the software wasn't designed to encounter, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. Note all circumstances and contact IBM Informix Technical Support if the error recurs, per the official guidance.
Examples
Recording circumstances for support

Capture the exact filename and line number reported, the operation being performed, and any surrounding log entries before contacting IBM Informix Technical Support.

Diagnostic Checks
  1. Check whether the error is reproducible, and if so, gather full circumstances (including the reported filename/line number) before escalating to IBM Informix Technical Support.
Related Errors / Related Topics

No closely related error codes are cross-referenced for -3999 in this set yet.

An internal error occurred that should not happen — record the reported filename/line number and circumstances, and contact IBM Informix Technical Support if it recurs.