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 MARL-004 — WARN Could not save.VR file …

Manufacturer wording — WARN Could not save.VR file %s
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC MARL-004 (“WARN Could not save.VR file …”): Error occurred while saving a.VR file First check: Check if the disk drive is connected or if there is a problem with the cable.

Updated 2026-09-17 · LogrobotLM reference

Description

Error occurred while saving a.VR file

Remedy

Check if the disk drive is connected or if there is a problem with the cable. Check if the floppy disk is formatted and if it is a double density diskette. Check if the diskette is full.

Related codes

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 →