KUKA Error 2171 — EXTENSION NOT ALLOWED
InfoDisplayed as KSS02171 on KRC4 / KRC5 controllers
KUKA 2171 (“EXTENSION NOT ALLOWED”): An extension that is not permissible at this point has been entered. First check: Delete the extension.
Updated 2026-09-09 · LogrobotLM reference
Cause
An extension that is not permissible at this point has been entered.
Troubleshooting
Delete the extension.
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 →