How To Fix EA408 - Interface for function & is incorrect

SAP Error Message - Details

• Message type: E = Error

• Message class: EA - IDoc Basis Messages

• Message number: 408

• Message text: Interface for function & is incorrect

What causes this issue?

The interface of the specified function module &v1& is incorrect.
It does not correspond to the interface which is valid from Release
3.0.

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?

Adjust the interface for the function module accordingly or enter
another function module.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EA408 - Interface for function & is incorrect ?

  The SAP error message EA408 indicates that there is an issue with the interface of a function module. This error typically arises when the function module being called does not match the expected interface, which can be due to various reasons such as changes in the function module, incorrect parameters being passed, or issues with the data types.
  Causes:
  
  Mismatch in Function Module Signature: The function module has been changed (e.g., parameters added, removed, or modified) but the calling program has not been updated accordingly.
  Incorrect Parameter Types: The data types of the parameters being passed do not match the expected types in the function module.
  Missing Parameters: Required parameters are not being passed to the function module.
  Versioning Issues: If the function module is part of a transport request, it may not be in sync with the version in the development or production environment.
  Authorization Issues: Sometimes, authorization issues can lead to unexpected behavior, although this is less common for interface errors.
  
  Solutions:
  
  Check Function Module Definition: Go to transaction SE37 (Function Builder) and check the definition of the function module to ensure that the parameters being passed match the expected interface.
  Update Calling Program: If the function module has changed, update the calling program to match the new interface.
  Parameter Types: Ensure that the data types of the parameters being passed are correct. Use the appropriate data types as defined in the function module.
  Debugging: Use the debugger to step through the code and identify where the mismatch occurs. This can help pinpoint the exact parameter causing the issue.
  Transport Requests: If the function module was recently transported, ensure that the transport was successful and that the correct version is active in the system.
  Check for Notes: Look for SAP Notes related to the function module or error message EA408, as there may be known issues or patches available.
  
  Related Information:
  
  Transaction Codes: SE37 (Function Module), SE80 (Object Navigator), SE11 (Data Dictionary).
  SAP Notes: Search the SAP Support Portal for any relevant notes that might address this specific error.
  Documentation: Review the documentation for the function module to understand its expected parameters and usage.
  
  By following these steps, you should be able to identify and resolve the issue causing the EA408 error in SAP.