LogrobotLM

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FANUC Alarm FILE-051 — WARN NESTED kread issued

FANUC FILE-051 (“WARN NESTED kread issued”): A call to kread was made while a WOULDBLOCK read was pending First check: Do not call kread again until the packet from the previous read has been rcvd

Updated 2026-08-29 · LogrobotLM reference

Description

A call to kread was made while a WOULDBLOCK read was pending

Remedy · Remède

Do not call kread again until the packet from the previous read has been rcvd

Frequently asked · Questions fréquentes

What does FANUC alarm FILE-051 mean?
FANUC FILE-051 (“WARN NESTED kread issued”): A call to kread was made while a WOULDBLOCK read was pending
How do you troubleshoot FANUC alarm FILE-051?
Do not call kread again until the packet from the previous read has been rcvd

Related codes / Codes liés

FILE-049WARN File is not standard fileFILE-050WARN PChamp %s device NOT ready - device FULLFILE-052WARN Kread re-call with different buf_pFILE-053WARN MC Inserted

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →