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 →

FANUC Alarm FRSY-012 — WARN Invalid file access mode

FANUC FRSY-012 (“WARN Invalid file access mode”): The requested command cannot be performed because the file is not opened with the proper access mode. First check: Open the file with the proper access mode.

Updated 2026-09-17 · LogrobotLM reference

Description

The requested command cannot be performed because the file is not opened with the proper access mode. This error is also caused by trying to update or append to an existing file on the FROM disk or to an existing compressed file on the RAM disk. Update and append are only allowed with uncompressed files on the RAM disk.

Remedy

Open the file with the proper access mode.

Related codes

FRSY-010WARN Invalid file positionFRSY-011WARN Directory fullFRSY-013WARN Device is too fragmentedFRSY-014WARN File not found

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 →