How To Fix E9871 - Internal error: Invalid combination of parameters in function module &1

SAP Error Message - Details

• Message type: E = Error

• Message class: E9 - General IS-U Error Messages

• Message number: 871

• Message text: Internal error: Invalid combination of parameters in function module &1

What causes this issue?

The specified function module was called.

System Response

The function module requires a valid combination of parameters in order
to function correctly.

How to fix this error?

Note the following:
The message text and message number
The name of the internal table and the name of the module/form
The transaction/report
And the entries that led to this error
Send a message with these specifications to SAP.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E9871 - Internal error: Invalid combination of parameters in function module &1 ?

  The SAP error message E9871, which states "Internal error: Invalid combination of parameters in function module &1," typically indicates that there is an issue with the parameters being passed to a specific function module in SAP. This error can arise due to various reasons, including incorrect data being sent to the function module, a mismatch in expected parameter types, or even issues with the function module itself.
  Causes:
  
  Incorrect Parameter Values: The parameters being passed to the function module may not match the expected values or types. This could be due to incorrect data being retrieved or processed before the function call.
  Configuration Issues: There may be configuration settings in the system that are not aligned with the expected parameters for the function module.
  Custom Code: If there is custom ABAP code that calls the function module, it may not be handling the parameters correctly.
  SAP Notes: There may be known issues with the specific function module that have been documented in SAP Notes, which may require a patch or update.
  
  Solutions:
  
  Check Parameter Values: Review the parameters being passed to the function module. Ensure that they are of the correct type and within the expected range of values.
  Debugging: Use the ABAP debugger to step through the code and inspect the values of the parameters just before the function module is called. This can help identify any discrepancies.
  Review Documentation: Check the documentation for the function module to understand the expected parameters and their types. This can often be found in the SAP Help Portal or within the SAP system itself.
  SAP Notes: Search for relevant SAP Notes that may address this specific error. You can do this through the SAP Support Portal or transaction SNOTE in your SAP system.
  Consult with SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP Support for assistance. Provide them with details about the error, including the function module name and the context in which the error occurs.
  
  Related Information:
  
  Function Module Documentation: You can access the documentation for the specific function module by using transaction SE37 (Function Module) in SAP. This will provide insights into the expected parameters and their descriptions.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in troubleshooting, such as SE80 (Object Navigator), SE11 (Data Dictionary), and SE24 (Class Builder).
  Error Logs: Check the system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify the root cause of the E9871 error and implement a suitable solution.