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KUKA Error 2121 — INCORRECT DIMENSION

Displayed as KSS02121 on KRC4 / KRC5 controllers

KUKA 2121 (“INCORRECT DIMENSION”): The specified array size does not match the declared size. First check: Modify the program.

Updated 2026-09-09 · LogrobotLM reference

Cause

The specified array size does not match the declared size. Example: DECL INT f[3] f[4,3]=1

Effect

The program is not executable.

Troubleshooting

Modify the program. Example: DECL INT f[3] f[2]=1 1

Related codes

2122NAME NOT DECLARED AS AN ARRAY2119COMPILATION LOCATION INCOMPATIBLE WITH CALL LOCATION2123NAME NOT DECLARED AS A FUNCTION2118TYPE CHANGE FOR INITIAL VALUE NOT POSSIBLE

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 →