LogrobotLM

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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

Do a full load from the original distribution media.

Related codes

OPTN-014WARN Dependency nesting too deepOPTN-015WARN Excludes: `…OPTN-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. How this reference is built →