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Informix Error -392

-392 System error - unexpected null pointer encountered.

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

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-392 is explicitly documented as an internal error — like -361, this shouldn't normally occur under ordinary usage, and points to an unexpected internal condition inside the database server rather than anything a developer would trigger through routine query writing.

  1. An internal server-side bug triggered by a specific, likely unusual combination of statement structure and data.
  2. A client/driver-level issue interacting badly with the server in a way that produces an internal null-pointer condition server-side.
  3. Corruption or an edge-case data condition that the server didn't anticipate handling.
Solutions / Resolution
  1. Don't expect to encounter this under normal usage, per the official guidance.
  2. If it recurs, document the exact circumstances — the statement being executed, client driver/version, server version, and any other conditions present at the time.
  3. Contact IBM Informix Technical Support with that documentation, per the official guidance, rather than attempting to diagnose or work around it at the application level.
  4. Check for a known issue or patch for the specific server version in use, since internal errors like this are sometimes already tracked and fixed in later maintenance releases.
Examples
Documenting the circumstances for a support case
- Exact statement being executed
- Client driver and version
- Server version
- Frequency: one-off or reproducible?
- Any other errors or anomalies around the same time
Diagnostic Checks
  1. Confirm whether the error is a one-off or reproducible.
  2. Check the server version against known issues/patches for this specific internal error.
Related Errors / Related Topics
  • -361 — "Column size too large." Another error explicitly documented as internal, useful as a contrast — both point away from SQL-level troubleshooting and toward vendor support.

This is documented as an internal error, not a query-writing mistake — if it recurs, gather detailed reproduction information and escalate to IBM Informix Technical Support rather than searching for a SQL-level fix.