What causes KUKA Robot alarm KRC0820?

Label or identifier @P1@ is referenced but never declared using DEF, DECL, or LABEL statements. Typo or spelling mismatch between the label declaration and its reference. Label declared in a different scope or module that is not accessible to the current program. Missing or incorrect module import/include statement needed to access the label. Label was deleted or commented out but references to it remain in the code.

How do I fix KUKA Robot alarm KRC0820?

1. Review the error message and identify the exact label name @P1@ that is not declared 2. Search the entire KRL program and all included modules for the declaration of @P1@ 3. Verify the spelling and capitalization of @P1@ in both the declaration and all reference locations match exactly 4. Confirm that any required module containing @P1@ is properly included using INCLUDE or IMPORT statements 5. Check the scope visibility - ensure @P1@ is declared at global level or in an accessible function/module 6. Declare the missing label using appropriate KRL syntax (DEF for functions, DECL for variables, or LABEL for jump targets) if intentionally omitted

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0820

KUKA Robot KRC0820 - NAME NOT DECLARED AS LABEL 2156

This alarm indicates that a label or identifier referenced in the KRL program has not been properly declared before use. The compiler encountered a reference to @P1@ that does not correspond to any defined label, function, or variable declaration in the current scope or accessible modules.

KUKA RobotSystemBasic

KRC0820

KUKA Robot KRC0820 - NAME NOT DECLARED AS LABEL 2156

NAME NOT DECLARED AS LABEL 2156

Common Causes

Label or identifier @P1@ is referenced but never declared using DEF, DECL, or LABEL statements
Typo or spelling mismatch between the label declaration and its reference
Label declared in a different scope or module that is not accessible to the current program
Missing or incorrect module import/include statement needed to access the label
Label was deleted or commented out but references to it remain in the code

Troubleshooting Steps

1Review the error message and identify the exact label name @P1@ that is not declared
2Search the entire KRL program and all included modules for the declaration of @P1@
3Verify the spelling and capitalization of @P1@ in both the declaration and all reference locations match exactly
4Confirm that any required module containing @P1@ is properly included using INCLUDE or IMPORT statements
5Check the scope visibility - ensure @P1@ is declared at global level or in an accessible function/module
6Declare the missing label using appropriate KRL syntax (DEF for functions, DECL for variables, or LABEL for jump targets) if intentionally omitted

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