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KUKA Error 2129 — FORMAL PARAMETER NOT DEFINED

Displayed as KSS02129 on KRC4 / KRC5 controllers

KUKA 2129 (“FORMAL PARAMETER NOT DEFINED”): No data type has been assigned to the formal parameters in the subprogram or function. First check: Modify the program.

Updated 2026-09-09 · LogrobotLM reference

Cause

No data type has been assigned to the formal parameters in the subprogram or function. Example: INT i i=1 Hb(i) ... DEF Hb(a:IN) END

Effect

The program is not executable.

Troubleshooting

Modify the program. Example: INT i i=1 Hb(i) ... DEF Hb(a:IN) INT a ... END

Related codes

2128MORE ACTUAL PARAMETERS THAN FORMAL PARAMETERS SPECIFIED2130EXPRESSION AFTER RETURN NOT ALLOWED2127DECLARATION FOR PARAMETER MISSING2131EXPRESSION MISSING AFTER THE RETURN STATEMENT

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