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FANUC Alarm LANG-077 — Invalid mnenonic syntax

FANUC LANG-077 (“Invalid mnenonic syntax”): The Ascii Input encountered an error in the mnenonic section. First check: Fix the /MN section of the.LS file.

Updated 2026-09-17 · LogrobotLM reference

Description

The Ascii Input encountered an error in the mnenonic section.

Remedy

Fix the /MN section of the.LS file.

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 →