Informix Error -1345: Undefined opcode.

Reasons / Common Causes

-1345 fires when a program's p-code file (.4go) has become corrupted — per the official guidance, recompiling the whole program is the documented fix.

1. A corrupted .4go p-code file, per the official guidance — the direct, named cause.
2. A p-code compiler/runner version mismatch, per the official guidance's follow-up suggestion, if recompiling doesn't resolve it — the same class of issue as -1336.

Solutions / Resolution

1. Recompile the whole program, and run it again, per the official guidance — this is the documented, first fix.
2. If the problem persists, verify that identical versions of both the p-code compiler and runner are being used, per the official guidance.
3. If it continues, document all relevant circumstances and contact IBM Informix Technical Support, per the official guidance.

Examples

Recompiling the program

$ fglpc module_a.4gl module_b.4gl -o program.4go

Diagnostic Checks

1. Recompile the whole program first, per the official guidance.
2. Check the p-code compiler and runner versions match, per the official guidance, if recompiling doesn't resolve it.

Related Errors / Related Topics

• -1336 — "Module name in the pcode file contains pcode version compile-version." A related p-code error, about an explicit version-mismatch message rather than a corrupted file.

A corrupted .4go p-code file — recompile the whole program, and check compiler/runner version alignment if it persists.