FANUC Alarm HOST-287 — SMB: DOS error: Too many open files
FANUC HOST-287 (“SMB: DOS error: Too many open files”): The PC server was unable to open the requested file, because the robot controller has too many files opened to the remote PC. First check: Close some files that the robot controller has opened on the PC Share client tag associated with the remote PC.
Updated 2026-08-29 · LogrobotLM reference
Description
The PC server was unable to open the requested file, because the robot controller has too many files opened to the remote PC.
Remedy · Remède
Close some files that the robot controller has opened on the PC Share client tag associated with the remote PC. If the problem persists, document the events that led to the error, and call your FANUC or FANUC Robotics technical representative.
Frequently asked · Questions fréquentes
- What does FANUC alarm HOST-287 mean?
- FANUC HOST-287 (“SMB: DOS error: Too many open files”): The PC server was unable to open the requested file, because the robot controller has too many files opened to the remote PC.
- How do you troubleshoot FANUC alarm HOST-287?
- Close some files that the robot controller has opened on the PC Share client tag associated with the remote PC. If the problem persists, document the events that led to the error, and call your FANUC or FANUC Robotics technical representative.
Related codes / Codes liés
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 →