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KUKA Error 2803 — UNDEFINED SYNTAX ERROR

Displayed as KSS02803 on KRC4 / KRC5 controllers

KUKA 2803 (“UNDEFINED SYNTAX ERROR”): An unknown syntax error has occurred. First check: Modify the program.

Updated 2026-09-09 · LogrobotLM reference

Cause

An unknown syntax error has occurred.

Effect

The program cannot be executed.

Troubleshooting

Modify the program.

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 →