LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm FILE-028 — WARN Illegal data block

FANUC FILE-028 (“WARN Illegal data block”): Data block is broken which is used in FIND_NEXT request. First check: You should keep the data block which is returned from the previous FIND_FIRST or FIND_NEXT request.

Updated 2026-09-17 · LogrobotLM reference

Description

Data block is broken which is used in FIND_NEXT request.

Remedy

You should keep the data block which is returned from the previous FIND_FIRST or FIND_NEXT request.

Related codes

FILE-026WARN Illegal access modeFILE-027WARN Illegal attributeFILE-029WARN Command is not supportedFILE-030WARN Device lun table is full

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 →