How To Fix FDT_EXPRESSIONS863 - Parametername &1 is used twice in function &2 only 1 mapping is possible

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 863

• Message text: Parametername &1 is used twice in function &2 only 1 mapping is possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS863 - Parametername &1 is used twice in function &2 only 1 mapping is possible ?

  The SAP error message FDT_EXPRESSIONS863 indicates that there is a problem with the mapping configuration in your SAP system, specifically within the context of the Function Module or Expression used in the Data Transformation (DT) process. The error message states that a parameter name is being used more than once in a function, which is not allowed.
  Cause:
  The error occurs when:
  
  A parameter name (denoted as &1 in the error message) is defined multiple times within the same function (denoted as &2).
  This can happen if you have inadvertently duplicated a parameter in the mapping configuration or if there is a misconfiguration in the function module.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Review the Mapping Configuration:
  
  Open the mapping where the error is occurring.
  Check the parameters defined in the function. Look for any duplicate parameter names.
  
  
  
  Rename or Remove Duplicates:
  
  If you find that the same parameter name is used more than once, you will need to either rename one of the parameters or remove the duplicate entry.
  Ensure that each parameter name is unique within the context of the function.
  
  
  
  Validate the Function Module:
  
  If the function is a custom function module, review the code to ensure that parameters are defined correctly and that there are no duplicates.
  
  
  
  Test the Changes:
  
  After making the necessary adjustments, save the changes and test the mapping again to ensure that the error is resolved.
  
  
  
  Check Documentation:
  
  If you are unsure about the parameters and their usage, refer to the SAP documentation or consult with a colleague who has experience with the specific function module.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  Debugging: If the issue persists, consider using debugging tools within SAP to trace the execution of the function and identify where the duplication is occurring.
  
  By following these steps, you should be able to resolve the FDT_EXPRESSIONS863 error and ensure that your mapping functions correctly.