How To Fix SPRX122 - Interface uses external and internal message definitions

SAP Error Message - Details

• Message type: E = Error

• Message class: SPRX - Proxy Generation

• Message number: 122

• Message text: Interface uses external and internal message definitions

What causes this issue?

In a message interface you can use messages from different sources:
Message types and fault message types edited in the Enterprise Services
Repository
Messages imported into the Enterprise Services Repository (external
definitions, RFC, IDoc)
In the current message interface, message types from different sources
have been used. Since messages from these different sources must be
handled differently during proxy generation, such a mixture of messages
within a message interface is not possible.

System Response

The interface cannot be generated.

How to fix this error?

Change the interface definition accordingly in the Enterprise Services
Repository.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SPRX122 - Interface uses external and internal message definitions ?

  The SAP error message SPRX122 indicates that there is a conflict between the external and internal message definitions in the interface you are working with. This typically occurs in scenarios involving IDocs, where the message type or structure defined in the external system does not match the internal definitions in SAP.
  Cause:
  
  Mismatch in Message Definitions: The external system is using a different message structure or type than what is defined in SAP. This can happen if the IDoc type or message type has been modified or if there are discrepancies in the data mapping.
  Configuration Issues: Incorrect configuration in the IDoc interface settings, such as the wrong message type being assigned to the IDoc type.
  Versioning Issues: If there are different versions of the message definitions being used between the systems, it can lead to this error.
  
  Solution:
  
  Check Message Definitions: Verify that the message type and IDoc type being used in the external system match the definitions in SAP. You can do this by checking the relevant configurations in transaction WE30 (IDoc Types) and WE81 (Message Types).
  Update Configuration: If there are discrepancies, update the configuration in either the external system or SAP to ensure they match. This may involve modifying the IDoc type or message type in SAP.
  Mapping Adjustments: If you are using a middleware (like SAP PI/PO), ensure that the mapping between the external and internal message definitions is correctly set up.
  Testing: After making the necessary changes, perform tests to ensure that the IDocs are processed correctly without errors.
  Consult Documentation: Review the SAP documentation or notes related to the specific message type and IDoc type you are working with for any additional guidance.
  
  Related Information:
  
  Transaction Codes: 
  
  WE30: To view and maintain IDoc types.
  WE81: To view and maintain message types.
  WE20: To configure partner profiles.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional guidance on this error.
  IDoc Monitoring: Use transaction WE02 or WE05 to monitor IDocs and check for any additional error messages or logs that can provide more context on the issue.
  
  By following these steps, you should be able to resolve the SPRX122 error and ensure that your interface works correctly.