KUKA Error 1399 — MESSAGE CANNOT BE ACKNOWLEDGED
Displayed as KSS01399 on KRC4 / KRC5 controllers
KUKA 1399 (“MESSAGE CANNOT BE ACKNOWLEDGED”): Acknowledgement of a status message. First check: None. Take note of the message.
Updated 2026-09-09 · LogrobotLM reference
Cause
Acknowledgement of a status message.
Effect
The command is not executed.
Troubleshooting
None. Take note of the message.
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 →