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FANUC Alarm GUID-101 — WARN Cannot run monitoring task

FANUC GUID-101 (“WARN Cannot run monitoring task”): Cannot run monitoring task Cannot start the KAREL shell program to monitor I/O events First check: Abort unwanted/paused KAREL programs.

Updated 2026-09-17 · LogrobotLM reference

Description

Cannot run monitoring task Cannot start the KAREL shell program to monitor I/O events

Remedy

Abort unwanted/paused KAREL programs. Or increase maximum number of tasks at control start.

Related codes

GUID-060WARN LT File R/W while moving.GUID-100WARN Unknown errorGUID-102WARN Cannot calibrate sensor.GUID-103WARN TPE operation error.

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 →