What causes KUKA Robot alarm KRC0685?

Function declared as EXTERNAL in one module but defined as a regular subroutine in another module. Missing EXTERNAL keyword in the function declaration when it should be accessible from other programs. Incorrect function signature or parameter mismatch between the declaration and implementation. Function implementation file not properly included or linked in the project structure. Mixing of function definition types (DEFFCT vs DEF) within related program modules.

How do I fix KUKA Robot alarm KRC0685?

1. Verify the function is declared with DEFFCT EXTERNAL in the header file or calling module 2. Check that the function implementation uses DEFFCT EXTERNAL with matching parameters and return type 3. Review all function declarations across modules to ensure consistency with EXTERNAL keyword usage 4. Confirm the function definition file is properly included in the project and accessible to calling programs 5. Recompile the entire project after correcting function declarations to ensure all references are updated 6. If the function should be internal only, remove EXTERNAL keyword from the calling reference or change the called function definition accordingly

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0685

KUKA Robot KRC0685 - EXTERNAL FUNCTION EXPECTED, SUBROUTINE FOUND 2021

This alarm occurs when the KRL compiler encounters a subroutine (DEFFCT or DEF) where an external function declaration (DEFFCT EXTERNAL) is expected. The compiler has detected a mismatch between the function type declared in the calling code and the actual function definition found in the program.

KUKA RobotSystemBasic

KRC0685

KUKA Robot KRC0685 - EXTERNAL FUNCTION EXPECTED, SUBROUTINE FOUND 2021

EXTERNAL FUNCTION EXPECTED, SUBROUTINE FOUND 2021

Common Causes

Function declared as EXTERNAL in one module but defined as a regular subroutine in another module
Missing EXTERNAL keyword in the function declaration when it should be accessible from other programs
Incorrect function signature or parameter mismatch between the declaration and implementation
Function implementation file not properly included or linked in the project structure
Mixing of function definition types (DEFFCT vs DEF) within related program modules

Troubleshooting Steps

1Verify the function is declared with DEFFCT EXTERNAL in the header file or calling module
2Check that the function implementation uses DEFFCT EXTERNAL with matching parameters and return type
3Review all function declarations across modules to ensure consistency with EXTERNAL keyword usage
4Confirm the function definition file is properly included in the project and accessible to calling programs
5Recompile the entire project after correcting function declarations to ensure all references are updated
6If the function should be internal only, remove EXTERNAL keyword from the calling reference or change the called function definition accordingly

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