How To Fix FDT_EXPRESSIONS166 - Supply a return parameter or a return value but not both (position &1)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 166

• Message text: Supply a return parameter or a return value but not both (position &1)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS166 - Supply a return parameter or a return value but not both (position &1) ?

  The SAP error message FDT_EXPRESSIONS166 indicates that there is an issue with the way return parameters or return values are defined in a function module or method within the SAP system. Specifically, the error states that you need to supply either a return parameter or a return value, but not both at the same time.
  Cause:
  This error typically occurs in the context of using expressions or function modules in SAP, particularly when working with the FDT (Form Data Tool) or similar frameworks. The root cause of the error is that the function or method is incorrectly configured to return both a return parameter and a return value, which is not allowed.
  Solution:
  To resolve this error, you should:
  
  
  Review the Function Module/Method Definition:
  
  Check the definition of the function module or method where the error is occurring.
  Ensure that you are only using either a return parameter or a return value, but not both.
  
  
  
  Modify the Code:
  
  If you have defined both a return parameter and a return value, decide which one you need based on your requirements.
  Remove the unnecessary return type from the definition.
  
  
  
  Test the Changes:
  
  After making the necessary changes, test the function/module to ensure that it works as expected without triggering the error.
  
  
  
  Related Information:
  
  Return Parameters: These are typically used to return values from a function/module to the calling program. They are defined in the function interface.
  Return Values: These are usually the values that a function/module directly returns when it is called, often used in programming languages that support return statements.
  FDT (Form Data Tool): This is a tool used in SAP for managing forms and data processing. Understanding how it handles expressions and function calls can help in troubleshooting similar issues.
  
  Additional Tips:
  
  If you are unsure about the correct configuration, refer to the SAP documentation or consult with a colleague who has experience with the specific function/module you are working with.
  If the error persists after making changes, consider checking for any related notes or updates from SAP that might address this issue.
  
  By following these steps, you should be able to resolve the FDT_EXPRESSIONS166 error and ensure that your function/module behaves correctly.