Informix Error -21602: Input file could not be opened.

Reasons / Common Causes

-21602 is an internal mkmessage error — per the official guidance, no user-actionable cause is documented beyond the input file failing to open.

1. The input file failing to open, per the official guidance — no further named detail; check the file's existence and permissions.

Solutions / Resolution

1. If this internal error recurs, note all circumstances and contact IBM Informix Technical Support, per the official guidance.

Examples

N/A

No specific triggering statement is documented — this is reported as an internal error.

Diagnostic Checks

1. Check that the input file exists and is readable, and escalate to IBM Informix Technical Support if the error recurs.

Related Errors / Related Topics

• -21603 — "Output file could not be created." The mirror-image error, on the output file rather than the input file.
• -21615 — "Output file could not be opened for read/write." A related output-file error, on opening for read/write rather than creating.

mkmessage couldn't open its input file — check that it exists and is readable.