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FANUC Alarm MEMO-171 — FILE program cannot be modified

FANUC MEMO-171 (“FILE program cannot be modified”): FILE programs are write protected unless they are in the editor. First check: Move the program to another storage type temporarily or permanently.

Updated 2026-09-17 · LogrobotLM reference

Description

FILE programs are write protected unless they are in the editor. So you cannot modify attributes and other program data for this type of program storage

Remedy

Move the program to another storage type temporarily or permanently. CMOS, SHADOW and SHADOW ONEMAND all support this type of modification.

Related codes

MEMO-169Clear failed for …MEMO-170Program name too longMEMO-172Extended storage feature not loadedMEMO-173No more program name space

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 →