LogrobotLM

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 OPTN-016 — WARN Key file is missing/corrupt

FANUC OPTN-016 (“WARN Key file is missing/corrupt”): The KEY file, keyfile.dat, is missing or corrupted First check: Do a full load from the original distribution media.

Updated 2026-08-29 · LogrobotLM reference

Description

The KEY file, keyfile.dat, is missing or corrupted

Remedy · Remède

Do a full load from the original distribution media.

Frequently asked · Questions fréquentes

What does FANUC alarm OPTN-016 mean?
FANUC OPTN-016 (“WARN Key file is missing/corrupt”): The KEY file, keyfile.dat, is missing or corrupted
How do you troubleshoot FANUC alarm OPTN-016?
Do a full load from the original distribution media.

Related codes / Codes liés

OPTN-014WARN Dependency nesting too deepOPTN-015WARN Excludes: `%sOPTN-017WARN No UPDATES on this mediaOPTN-018WARN No CUSTOMIZATIONS on this media

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 →