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

SPRX122 - Overview

• 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.

SPRX122 - Details

• 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