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FANUC Alarm DMER-021 — STOPL Not enough device memory free

FANUC DMER-021 (“STOPL Not enough device memory free”): The device specified in the Data Monitor schedule does not have enough file space available. First check: Use a memory card or floppy disk with more memory available or specify a smaller file_size in the Data Monitor schedule.

Updated 2026-09-17 · LogrobotLM reference

Description

The device specified in the Data Monitor schedule does not have enough file space available.

Remedy

Use a memory card or floppy disk with more memory available or specify a smaller file_size in the Data Monitor schedule.

Related codes

DMER-019STOPL Data cannot be savedDMER-020STOPL Record buffer limitDMER-022Invalid file sizeDMER-023File is incomplete

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 →