LogrobotLM

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FANUC Alarm FILE-018 — WARN File is already opened

FANUC FILE-018 (“WARN File is already opened”): You tried to create/delete/rename a file which is already opened. First check: Close file before such operations.

Updated 2026-09-17 · LogrobotLM reference

Description

You tried to create/delete/rename a file which is already opened.

Remedy

Close file before such operations.

Related codes

FILE-016WARN File cannot expandFILE-017WARN File not openFILE-019WARN File is lockedFILE-020WARN Illegal file size

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 →