Informix Error -9720: Module name or language name specified is not valid.

Reasons / Common Causes

-9720 fires when ifx_replace_module() or ifx_unload_module() is called with an invalid module name or language name — per the official guidance; the only valid language name for these functions is C.

1. An invalid module name, per the official guidance — the first named cause.
2. A language name other than C, per the official guidance — the second named cause.

Solutions / Resolution

1. Check the module name for correctness, per the official guidance.
2. Check whether the module's path is included in DB_LIBRARY_PATH, per the official guidance.
3. Replace the module name or language name, or update DB_LIBRARY_PATH, and execute the function again, per the official guidance.

Examples

Checking DB_LIBRARY_PATH

SELECT DBINFO('setting', 'DB_LIBRARY_PATH') FROM systables WHERE tabid = 1;

Diagnostic Checks

1. Check the module name's correctness, the language name (must be C), and whether DB_LIBRARY_PATH includes the module's path, correcting whichever is at fault.

Related Errors / Related Topics

• -9721 — "Module name could not be unloaded while in use." A related module- management error, on the module still being in use rather than an invalid name.

ifx_replace_module()/ifx_unload_module() was called with an invalid module or language name — check the module name, that language is C, and DB_LIBRARY_PATH.