How To Fix CRM_EXT_REF001 - Incorrect parameter transfer when calling up function module '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_EXT_REF - Messages for Add. External References Set

• Message number: 001

• Message text: Incorrect parameter transfer when calling up function module '&1'

What causes this issue?

The call of a function module does not contain all the necessary
transfer parameters.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Contact system administration or SAP support.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_EXT_REF001 - Incorrect parameter transfer when calling up function module '&1' ?

  The SAP error message CRM_EXT_REF001, which indicates "Incorrect parameter transfer when calling up function module '&1'," typically arises when there is a mismatch in the parameters being passed to a function module in the SAP system. This can occur in various scenarios, particularly in CRM (Customer Relationship Management) applications.
  Causes:
  
  Parameter Mismatch: The parameters being passed to the function module do not match the expected parameters in terms of type, number, or sequence.
  Data Type Issues: The data types of the parameters may not be compatible (e.g., passing a string where a numeric value is expected).
  Missing Required Parameters: Some required parameters may not be provided when calling the function module.
  Incorrect Function Module: The wrong function module may be called, which does not accept the parameters being passed.
  Custom Code Issues: If there is custom code involved, it may not be correctly handling the parameters.
  
  Solutions:
  
  Check Function Module Definition: Review the definition of the function module being called (using transaction SE37) to ensure that the parameters being passed match the expected parameters in terms of type, number, and sequence.
  Debugging: Use the debugger to step through the code where the function module is called. This will help identify the exact parameters being passed and their values.
  Review Custom Code: If the error is occurring in custom code, review the logic to ensure that parameters are being populated correctly before the function module call.
  Consult Documentation: Check the SAP documentation or help files for the specific function module to understand its requirements and constraints.
  Error Handling: Implement error handling to catch and log any issues when calling the function module, which can provide more context for troubleshooting.
  SAP Notes: Search for relevant SAP Notes that may address known issues with the function module or provide guidance on parameter handling.
  
  Related Information:
  
  Transaction Codes: Use transaction SE37 to view and analyze the function module.
  Debugging Tools: Utilize the ABAP debugger to trace the execution and inspect variable values.
  SAP Community: Engage with the SAP Community or forums for insights from other users who may have encountered similar issues.
  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 the root cause of the CRM_EXT_REF001 error and implement a suitable solution.