How To Fix WU073 - Unvalid function during function module call (1,2,3 are allowed)

SAP Error Message - Details

• Message type: E = Error

• Message class: WU - Promotion management messages

• Message number: 073

• Message text: Unvalid function during function module call (1,2,3 are allowed)

What causes this issue?

The function module for saving a promotion module was called
incorrectly.

How to fix this error?

INCLUDE ISR_SYSTEMFEHLER

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WU073 - Unvalid function during function module call (1,2,3 are allowed) ?

  The SAP error message WU073, which states "Invalid function during function module call (1,2,3 are allowed)," typically occurs when there is an issue with the parameters being passed to a function module in SAP. This error indicates that the function module is expecting a specific type of input, but the input provided does not match the expected values.
  Cause:
  
  Invalid Function Code: The function module is expecting a function code of 1, 2, or 3, but a different value is being passed.
  Incorrect Parameter Mapping: The parameters being passed to the function module may not be correctly mapped or may be missing.
  Custom Code Issues: If the function module is part of a custom development, there may be issues in the custom code that lead to this error.
  Data Type Mismatch: The data type of the input parameters may not match what the function module expects.
  
  Solution:
  
  Check Function Module Documentation: Review the documentation for the function module to understand the expected input parameters and their valid values.
  Validate Input Parameters: Ensure that the parameters being passed to the function module are valid and within the expected range (1, 2, or 3).
  Debugging: If you have access to the ABAP debugger, you can set breakpoints in the code that calls the function module to inspect the values being passed.
  Review Custom Code: If the function module is part of a custom development, review the code for any logical errors or incorrect parameter handling.
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or patches that may address this issue.
  
  Related Information:
  
  Function Module Name: Identify the specific function module that is causing the error. This can help in troubleshooting.
  Transaction Codes: Use transaction codes like SE37 (Function Builder) to view the function module and its parameters.
  Error Logs: Check transaction SLG1 (Application Log) for any additional error messages or logs that may provide more context.
  SAP Community: Consider searching or posting in the SAP Community forums for additional insights from other users who may have encountered the same issue.
  
  By following these steps, you should be able to identify the cause of the WU073 error and implement a solution to resolve it.