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KUKA Error 2279 — RETURN VALUE TYPE INCOMPATIBLE WITH FCT TYPE

Displayed as KSS02279 on KRC4 / KRC5 controllers

KUKA 2279 (“RETURN VALUE TYPE INCOMPATIBLE WITH FCT TYPE”): The value returned by the function does not correspond to the function type. First check: Modify the program.

Updated 2026-09-09 · LogrobotLM reference

Cause

The value returned by the function does not correspond to the function type. Example: DEFFCT BOOLalf() REALHugo Hugo=1 RETURN(Hugo) ENDFCT

Effect

The program cannot be executed.

Troubleshooting

Modify the program. Example: DEFFCT REALalf() REAL Hugo Hugo=1 RETURN(Hugo) ENDFCT

Related codes

2278RETURN VALUE: INCORRECT STRING CONST ARRAY2280RIGHT OPERAND: '()' NOT ALLOWED--PATH EXPRESSION2277ARRAY DIMENSION GREATER THAN 12276INCOMPATIBLE DIMENSION

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 →