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FANUC Alarm HOST-299 — SMB: DOS Error … from PC

Manufacturer wording — SMB: DOS Error %d from PC
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC HOST-299 (“SMB: DOS Error … from PC”): The PC responded to a PC share request with a DOS File Error. First check: First, check for an alarm cause code for more information on the specific DOS error.

Updated 2026-09-17 · LogrobotLM reference

Description

The PC responded to a PC share request with a DOS File Error.

Remedy

First, check for an alarm cause code for more information on the specific DOS error. If no alarm cause code exists, note the DOS error code. Lookup the DOS error code in the PC Share manual. If the problem persists, document the events that led to the error, and call your FANUC or FANUC Robotics technical representative.

Related codes

HOST-288SMB: DOS error: Access deniedHOST-289SMB: DOS error: Requested share does not existHOST-300Can't connect to CNCHOST-301Not Connected(Tag=…)

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 →