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LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

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 2026-08-29 · LogrobotLM reference

Description

File number is illegal.

Remedy · Remède

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

Frequently asked · Questions fréquentes

What does FANUC alarm FILE-023 mean?
FANUC FILE-023 (“WARN Illegal file number”): File number is illegal.
How do you troubleshoot FANUC alarm FILE-023?
Use a valid file number which is the ID returned from an open request.

Related codes / Codes liés

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →