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FANUC Alarm IBSS-558 — Clear_Param_Mem failed

FANUC IBSS-558 (“Clear_Param_Mem failed”): An internal system error occurred. First check: Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Updated 2026-09-17 · LogrobotLM reference

Description

An internal system error occurred.

Remedy

Document the events that led to the error, and call your FANUC or FANUC Robotics technical service representative.

Related codes

IBSS-556File_Close … failedIBSS-557Archive version unsupportedIBSS-559… files saved as ibbdfil.ibaIBSS-560… files loaded by ibbdfil.iba

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 →