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FANUC Alarm SPOT-354 — WARN Invalid IWC msg buffers

FANUC SPOT-354 (“WARN Invalid IWC msg buffers”): Invalid IWC msg buffers The buffers sent for a message transaction are not valid in number and/or length. First check: This is a system programming error.

Updated 2026-09-17 · LogrobotLM reference

Description

Invalid IWC msg buffers The buffers sent for a message transaction are not valid in number and/or length.

Remedy

This is a system programming error.

Related codes

SPOT-352WARN Invalid IWC indexSPOT-353WARN IWC message in progressSPOT-355WARN Invalid IWC function codeSPOT-356WARN Checksum error, IWC msg send

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 →