How To Fix 42226 - Parameter &2 was expected instead of &1 in the interface

SAP Error Message - Details

• Message type: E = Error

• Message class: 42 - Information Workbench

• Message number: 226

• Message text: Parameter &2 was expected instead of &1 in the interface

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 42226 - Parameter &2 was expected instead of &1 in the interface ?

  The SAP error message 42226 indicates that there is a mismatch in the parameters being passed to a function module or method in an interface. Specifically, it means that the system expected a parameter of a certain type (denoted by &2), but instead received a different type (denoted by &1). This can occur in various scenarios, such as when calling a BAPI, RFC, or any other function module.
  Cause:
  
  Parameter Mismatch: The most common cause is that the calling program is passing an incorrect data type or structure for one of the parameters.
  Changes in Interface: If the interface of the function module or method has changed (e.g., due to an upgrade or modification), the calling program may not be updated accordingly.
  Incorrect Data Mapping: If the data being passed is not correctly mapped to the expected structure or type, this error can occur.
  Version Compatibility: If there are version differences between the calling program and the function module, it may lead to this error.
  
  Solution:
  
  Check Parameter Types: Review the documentation for the function module or method to ensure that the parameters being passed match the expected types. You can do this by checking the function module in transaction SE37 or SE80.
  Update Calling Program: If the interface has changed, update the calling program to match the new parameter types.
  Debugging: Use the debugger to step through the code and inspect the values and types of the parameters being passed. This can help identify where the mismatch is occurring.
  Data Conversion: If necessary, convert the data to the expected type before passing it to the function module.
  Consult SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on the function module in question.
  
  Related Information:
  
  Transaction Codes: Use SE37 to view function modules and SE80 for object navigation.
  Documentation: Always refer to the official SAP documentation for the specific function module or method to understand the expected parameters.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Testing: If possible, create a test program to isolate the function call and experiment with different parameter values to identify the root cause.
  
  By following these steps, you should be able to resolve the error message 42226 and ensure that the parameters being passed to the interface are correct.