How To Fix MPN12001 - Error in interface parameter I_Funktion on calling function module

SAP Error Message - Details

• Message type: E = Error

• Message class: MPN12 - Message Class: Exchange in Quotation

• Message number: 001

• Message text: Error in interface parameter I_Funktion on calling function module

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MPN12001 - Error in interface parameter I_Funktion on calling function module ?

  The SAP error message MPN12001, which indicates "Error in interface parameter I_Funktion on calling function module," typically arises when there is an issue with the parameters being passed to a function module in SAP. This can occur due to various reasons, such as incorrect data types, missing required parameters, or issues with the function module itself.
  Causes:
  
  Incorrect Parameter Values: The values being passed to the function module may not match the expected data types or formats.
  Missing Parameters: Required parameters may not be provided when calling the function module.
  Function Module Issues: The function module itself may have bugs or may not be properly configured.
  Authorization Issues: The user may not have the necessary authorizations to execute the function module.
  Data Consistency Issues: The data being processed may not be consistent or valid, leading to errors when the function module is executed.
  
  Solutions:
  
  Check Parameter Values: Review the values being passed to the function module. Ensure that they match the expected data types and formats.
  Verify Required Parameters: Ensure that all required parameters are being passed to the function module. Check the documentation for the function module to confirm which parameters are mandatory.
  Debugging: Use the SAP debugger to step through the code and identify where the error occurs. This can help pinpoint the exact parameter causing the issue.
  Review Function Module: Check the function module for any known issues or updates. If necessary, consult with your SAP Basis or development team to see if there are any patches or notes related to the function module.
  Authorization Check: Ensure that the user executing the function module has the necessary authorizations. You can check this in transaction SU53 after the error occurs.
  Data Validation: Validate the data being processed to ensure it is consistent and meets the requirements of the function module.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE37 (Function Builder) to view the function module and its parameters.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the documentation for the specific function module to understand its parameters and expected behavior.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.