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KUKA Error 2143 — WRONG END OF CONTROL STRUCTURE

Displayed as KSS02143 on KRC4 / KRC5 controllers

KUKA 2143 (“WRONG END OF CONTROL STRUCTURE”): The syntax of control structures has not been observed. First check: Modify the program.

Updated 2026-09-09 · LogrobotLM reference

Cause

The syntax of control structures has not been observed. Example: FOR i=1 TO 6 ... ELSE ... ENDFOR

Effect

The program is not executable.

Troubleshooting

Modify the program. Example: FOR i=1 TO 6 ... ENDFOR

Related codes

2144'ENDLOOP' MISSING2145'ENDWHILE' MISSING2140NO ENUM TYPE DEFINED2146'ENDFOR' MISSING

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 →