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 CMND-021 — WARN Cannot rename file

FANUC CMND-021 (“WARN Cannot rename file”): The destination file name contained both alphanumeric characters and the global character First check: Use only alphanumeric characters or a single global character when renaming a file.

Updated 2026-09-17 · LogrobotLM reference

Description

The destination file name contained both alphanumeric characters and the global character

Remedy

Use only alphanumeric characters or a single global character when renaming a file.

Related codes

CMND-019WARN Operation cancelledCMND-020WARN End of directoryCMND-022STOP Time motion with dist beforeCMND-023No destination device or path

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 →