How To Fix FL331 - Import/export parameters cannot have the same names in pass by reference

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 331

• Message text: Import/export parameters cannot have the same names in pass by reference

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FL331 - Import/export parameters cannot have the same names in pass by reference ?

  The SAP error message FL331 indicates that there is a conflict in the naming of import and export parameters in a function module or method when using "pass by reference." Specifically, it means that the import and export parameters cannot have the same name because it creates ambiguity in the data flow.
  Cause:
  The error occurs when:
  
  A function module or method is defined with both import and export parameters that share the same name.
  This can lead to confusion about which parameter is being referenced when the function is called, especially when passing data by reference.
  
  Solution:
  To resolve this error, you should:
  
  
  Rename Parameters: Ensure that the import and export parameters have unique names. This can be done by:
  
  Modifying the names of either the import or export parameters to ensure they are distinct.
  Using a naming convention that clearly differentiates between import and export parameters (e.g., prefixing import parameters with "i" and export parameters with "e").
  
  
  
  Check Function Module/Method Definition: Review the definition of the function module or method in the ABAP Workbench (SE80 or SE37) and make the necessary changes.
  
  
  Recompile: After making changes, recompile the function module or method to ensure that the changes take effect.
  
  
  Related Information:
  
  Pass by Reference: In ABAP, when parameters are passed by reference, the actual data is passed, allowing the function to modify the original data. This is different from "pass by value," where a copy of the data is passed.
  Function Module/Method Design: When designing function modules or methods, it's a good practice to maintain clear and distinct naming conventions for parameters to avoid such conflicts and improve code readability.
  Testing: After making changes, thoroughly test the function module or method to ensure that it behaves as expected and that the parameters are being handled correctly.
  
  By following these steps, you should be able to resolve the FL331 error and ensure that your function module or method works correctly without naming conflicts.