KUKA Error 2126 — NOT A STRUCTURE DATA TYPE
Displayed as KSS02126 on KRC4 / KRC5 controllers
KUKA 2126 (“NOT A STRUCTURE DATA TYPE”): The variable is not of the Structure data type. First check: Modify the program.
Updated 2026-09-09 · LogrobotLM reference
Cause
The variable is not of the Structure data type. Example: INT Hugo Hugo.a=1
Effect
The program is not executable.
Troubleshooting
Modify the program. Example: INT Hugo Hugo=1
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 →