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FANUC Alarm VARS-034 — WARN Variable cannot be accessed

FANUC VARS-034 (“WARN Variable cannot be accessed”): The CMOS variable that you attempted to delete was created This could also be a KAREL program, Network or KCL was adding deleteing or doing a node operation when access was attempted First check: Delete the variable in the same start mode that the variable was created.

Updated 2026-09-17 · LogrobotLM reference

Description

The CMOS variable that you attempted to delete was created This could also be a KAREL program, Network or KCL was adding deleteing or doing a node operation when access was attempted

Remedy

Delete the variable in the same start mode that the variable was created. For example if a CMOS variable was created at CONTROLLED start it must be deleted at CONTROLLED start. If is be of some access conflict the attempt the operation again when no other variable accesses are in progress.

Related codes

VARS-032WARN Variable size too bigVARS-033WARN Maximum path length exceededVARS-036WARN CMOS memory is corruptVARS-037WARN Position register is locked

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 →