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FANUC Alarm HOST-239 — WARN KCL option not loaded

FANUC HOST-239 (“WARN KCL option not loaded”): A web page tried to issue a KCL command, but KCL is not loaded on the robot controller. First check: Load the KCL option on the robot controller at Controlled Start.

Updated 2026-09-17 · LogrobotLM reference

Description

A web page tried to issue a KCL command, but KCL is not loaded on the robot controller.

Remedy

Load the KCL option on the robot controller at Controlled Start.

Related codes

HOST-236WARN FTP: servers not auto-startedHOST-237WARN FTP: server tags not availableHOST-240EMAIL: Email send failedHOST-241EMAIL: Email send successful

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 →