How To Fix KB027 - Only one table parameter may be filled

SAP Error Message - Details

• Message type: E = Error

• Message class: KB - Controlling: Reporting

• Message number: 027

• Message text: Only one table parameter may be filled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message KB027 - Only one table parameter may be filled ?

  The SAP error message KB027, which states "Only one table parameter may be filled," typically occurs in the context of ABAP function modules or methods that are designed to accept table parameters. This error indicates that the function or method you are trying to call is expecting only one table parameter to be populated, but more than one has been filled.
  Cause:
  The error is caused by the following scenarios:
  
  Multiple Table Parameters: You are passing values to more than one table parameter in a function module or method that only allows one to be filled.
  Incorrect Function Call: The function module or method is being called incorrectly, leading to the filling of multiple table parameters.
  Misunderstanding of Function Interface: There may be a misunderstanding of the function's interface, where the developer assumes that multiple table parameters can be filled when the documentation specifies otherwise.
  
  Solution:
  To resolve the KB027 error, you can take the following steps:
  
  
  Review Function Module/Method Documentation: Check the documentation for the function module or method you are calling. Ensure you understand which parameters are expected and how they should be filled.
  
  
  Check Parameter Filling: Ensure that you are only populating one table parameter. If you have multiple table parameters, decide which one is necessary for your use case and remove the others.
  
  
  Debugging: If you are unsure where the error is occurring, use the ABAP debugger to step through the code and see which parameters are being filled at runtime.
  
  
  Refactor Code: If your logic requires multiple table parameters, consider refactoring your code to call the function/module multiple times with different parameters or to combine the data into a single table parameter if applicable.
  
  
  Consult with Colleagues or SAP Support: If you are still having trouble, consider discussing the issue with colleagues or reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Function Module Interface: Always check the interface of the function module or method you are using. You can do this in the SAP GUI by navigating to the function module and reviewing its parameters.
  ABAP Documentation: Familiarize yourself with ABAP programming guidelines and best practices, especially regarding function modules and method calls.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution effectively.