KUKA Error 1381 — BACKGROUND TASK BUSY
Displayed as KSS01381 on KRC4 / KRC5 controllers
KUKA 1381 (“BACKGROUND TASK BUSY”): A command is already being processed in the background. First check: Abort the command.
Updated 2026-09-09 · LogrobotLM reference
Cause
A command is already being processed in the background.
Effect
The command is not processed.
Troubleshooting
Abort the command. Wait until the current command has been processed.
Related codes
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 →