What causes KUKA Robot alarm KRC0387?

Attempting to assign data of incompatible type to a variable (e.g., assigning REAL to INT without conversion). Using incompatible extensions or custom data types in source/target declarations. Incorrect parameter passing to built-in KUKA functions with wrong data type signatures. Mixing axis-specific data types (AXIS, PTP_REL) with incompatible target specifications. Outdated or incorrect library imports conflicting with current KRC software version.

How do I fix KUKA Robot alarm KRC0387?

1. Review the program syntax at the line where alarm KRC0387 is triggered in the IDE error message 2. Verify source and target data types match the operation requirements; use TYPE command to check variable declarations 3. Ensure all custom extensions and user-defined data types are properly defined in the declaration section 4. Convert incompatible data types explicitly using KUKA conversion functions (e.g., INT(), REAL(), CHAR()) 5. Check KUKA library versions and software compatibility; update or reload standard library if necessary 6. Compile the program in debug mode to identify exact incompatibility location and correct the data assignment

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0387

KUKA Robot KRC0387 - Specify the source and target correctly. DATA NOT ALLOWED

This alarm indicates a data type mismatch or incompatible extension assignment in the KRC program code. The controller cannot process the specified source or target data because they are not compatible with the operation being performed, typically occurring during variable assignments, function calls, or instruction parameters.

KUKA RobotSystemBasic

KRC0387

KUKA Robot KRC0387 - Specify the source and target correctly. DATA NOT ALLOWED

Specify the source and target correctly. DATA NOT ALLOWED

Common Causes

Attempting to assign data of incompatible type to a variable (e.g., assigning REAL to INT without conversion)
Using incompatible extensions or custom data types in source/target declarations
Incorrect parameter passing to built-in KUKA functions with wrong data type signatures
Mixing axis-specific data types (AXIS, PTP_REL) with incompatible target specifications
Outdated or incorrect library imports conflicting with current KRC software version

Troubleshooting Steps

1Review the program syntax at the line where alarm KRC0387 is triggered in the IDE error message
2Verify source and target data types match the operation requirements; use TYPE command to check variable declarations
3Ensure all custom extensions and user-defined data types are properly defined in the declaration section
4Convert incompatible data types explicitly using KUKA conversion functions (e.g., INT(), REAL(), CHAR())
5Check KUKA library versions and software compatibility; update or reload standard library if necessary
6Compile the program in debug mode to identify exact incompatibility location and correct the data assignment

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