How To Fix WUF079 - Data reference parameters cannot be combined with fixed values

SAP Error Message - Details

• Message type: E = Error

• Message class: WUF -

• Message number: 079

• Message text: Data reference parameters cannot be combined with fixed values

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WUF079 - Data reference parameters cannot be combined with fixed values ?

  The SAP error message WUF079, which states "Data reference parameters cannot be combined with fixed values," typically occurs in the context of ABAP programming, particularly when dealing with function modules or methods that have parameters defined as data references.
  Cause:
  This error arises when you attempt to pass a combination of fixed values (constants or literals) and data reference parameters (which are typically pointers to data objects) in a way that is not allowed by the ABAP language rules. In ABAP, data reference parameters are meant to point to data objects, and you cannot mix them with fixed values in certain contexts, such as when calling a function module or method.
  Solution:
  To resolve this error, you need to ensure that you are not mixing fixed values with data reference parameters in a way that violates ABAP's syntax rules. Here are some steps you can take:
  
  
  Check Parameter Types: Review the function module or method signature to understand the expected parameter types. Ensure that you are passing the correct types.
  
  
  Use Data References Properly: If you need to pass a fixed value, consider creating a variable to hold that value and then pass a reference to that variable instead of the fixed value.
  For example, instead of:
  CALL FUNCTION 'MY_FUNCTION'
    EXPORTING
      param1 = 'Fixed Value'  " This may cause WUF079
      param2 = my_data_ref.
  You can do:
  DATA(lv_fixed_value) = 'Fixed Value'.
  CALL FUNCTION 'MY_FUNCTION'
    EXPORTING
      param1 = lv_fixed_value  " Now it's a variable
      param2 = my_data_ref.
  
  
  Review Documentation: Check the documentation for the function module or method you are using to ensure you understand how to correctly pass parameters.
  
  
  Debugging: If you are unsure where the error is occurring, use the ABAP debugger to step through your code and identify the exact line that triggers the error.
  
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with ABAP data types, especially data references, to understand how they work.
  Function Module Documentation: Always refer to the SAP documentation for the specific function module or method you are using to understand its parameter requirements.
  SAP Community: If you continue to face issues, consider reaching out to the SAP Community or forums for additional support and insights from other developers.
  
  By following these guidelines, you should be able to resolve the WUF079 error and ensure that your ABAP code adheres to the expected parameter conventions.