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Informix Error -33033: The field field-name is an Informix extension to XPG3 X/Open standard.

Cause and resolution

The field field-name is an Informix extension to XPG3 X/Open standard.

This message is a warning only. You used the -xopen option, asking that the source file be checked for compliance with the XPG3 X/Open standard. The ITYPE, IDATA and ILENGTH field names are Informix extensions to the standard.

Oninit® Troubleshooting Guidance

Reasons / Common Causes

-33033 is a preprocessor warning — per the official guidance, it fires when the -xopen compliance-check option is used and the source uses one of the ITYPE, IDATA, or ILENGTH fields, which are Informix extensions to the XPG3 X/Open standard.

  1. The -xopen option used with source code referencing ITYPE/IDATA/ILENGTH, per the official guidance — the direct, only cause.
Solutions / Resolution
  1. No action needed if the Informix extension is intentional, per the official guidance — this is a compliance warning, not an error requiring a fix.
  2. Remove use of the flagged field if strict XPG3 X/Open compliance is required, per the official guidance's implication.
Examples
N/A

No specific triggering statement is documented beyond using ITYPE/IDATA/ILENGTH under -xopen.

Diagnostic Checks
  1. Check whether strict XPG3 X/Open compliance is actually required, and remove the Informix-specific field if so.
Related Errors / Related Topics
  • -33036 — "This line does not conform to ANSI X3.135-1989." A related standards- compliance warning, for the -ansi option rather than -xopen.
  • -33038 — "This statement does not conform to the X/Open standard." A related standards-compliance warning, for the XPG4 (rather than XPG3) -xopen check.

An Informix extension field (ITYPE/IDATA/ILENGTH) was flagged under -xopen XPG3 compliance checking — a warning only, no action needed unless strict compliance is required.