LogrobotLM

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FANUC Alarm FILE-023 — WARN Illegal file number

FANUC FILE-023 (“WARN Illegal file number”): File number is illegal. First check: Use a valid file number which is the ID returned from an open request.

Updated 2026-09-17 · LogrobotLM reference

Description

File number is illegal.

Remedy

Use a valid file number which is the ID returned from an open request.

Related codes

FILE-021WARN End of fileFILE-022WARN Illegal file nameFILE-024WARN Illegal file typeFILE-025WARN Illegal protection code

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →