How To Fix VK391 - Call parameter & for function module & is incomplete

SAP Error Message - Details

• Message type: E = Error

• Message class: VK - Pflege und Bearbeitung von Konditionen

• Message number: 391

• Message text: Call parameter & for function module & is incomplete

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VK391 - Call parameter & for function module & is incomplete ?

  The SAP error message VK391, which states "Call parameter & for function module & is incomplete," typically indicates that a function module is being called with missing or incomplete parameters. This can occur in various scenarios, particularly when dealing with custom ABAP programs or enhancements.
  Cause:
  
  Missing Parameters: The function module being called requires certain parameters that are not being provided in the call.
  Incorrect Parameter Types: The parameters being passed may not match the expected data types or structures defined in the function module.
  Incorrect Function Module Usage: The function module may not be intended for the way it is being used, or it may require additional setup or context.
  Changes in Function Module: If the function module has been modified (e.g., added parameters) and the calling program has not been updated accordingly, this error can occur.
  
  Solution:
  
  Check Function Module Documentation: Review the documentation for the function module to understand the required parameters and their expected types.
  Review the Calling Code: Inspect the code where the function module is being called to ensure that all required parameters are being passed correctly.
  Debugging: Use the ABAP debugger to step through the code and identify which parameter is missing or incorrectly set.
  Update Code: If parameters are missing, update the calling code to include the necessary parameters. Ensure that the data types match the expected types in the function module.
  Consult SAP Notes: Check for any relevant SAP Notes that may address known issues with the function module or provide guidance on its usage.
  
  Related Information:
  
  Function Module Documentation: You can access the function module documentation in the SAP system by using transaction SE37 (Function Builder) and entering the name of the function module.
  ABAP Debugger: Familiarize yourself with the ABAP debugger to effectively trace and analyze the execution of your code.
  SAP Community: Engage with the SAP Community or forums for additional insights or similar issues faced by other users.
  SAP Support: If the issue persists and is critical, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the VK391 error in your SAP environment.