Message type: E = Error
Message class: OL - Workflow object types: Run-time system
Message number: 804
Message text: CallBack function '&' not defined
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OL804
- CallBack function '&' not defined ?The SAP error message OL804, which states "CallBack function '&' not defined," typically occurs in the context of SAP ABAP programming, particularly when dealing with function modules or methods that are expected to call a callback function that has not been defined or is not accessible in the current context.
Cause: Undefined Callback Function: The callback function that is being referenced in the code is not defined in the program or is misspelled. Scope Issues: The callback function may be defined in a different scope or context that is not accessible from where it is being called. Incorrect Function Signature: The function signature of the callback may not match what is expected, leading to the system not recognizing it. Missing Includes or Libraries: If the callback function is part of an include or library that has not been included in the program, it will not be recognized.
Solution: Check Function Definition: Ensure that the callback function is
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