How To Fix SPXN204 - Communication type of implementation doesn't match with contract

SPXN204 - Overview

• Message type: E = Error

• Message class: SPXN - Proxy Generation

• Message number: 204

• Message text: Communication type of implementation doesn't match with contract

What causes this issue?

For contract operations with communication type 'WebService via Event',
an Event Provider has to be assigned. For communication type
'WebService', a Service Consumer (or Service Group or Consumer Mapping)
has to be assigned.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SPXN204 - Communication type of implementation doesn't match with contract ?

  The SAP error message SPXN204 indicates that there is a mismatch between the communication type defined in the implementation and the contract in the context of SAP's Service-Oriented Architecture (SOA) or Enterprise Services. This typically occurs when the service implementation does not align with the expected communication type specified in the service contract.
  
  Cause:
  
  Mismatch in Communication Type: The implementation of the service may be set to a different communication type (e.g., synchronous vs. asynchronous) than what is defined in the service contract.
  Incorrect Configuration: The service interface or the implementation might not be correctly configured in the SAP system.
  Versioning Issues: If there are multiple versions of the service, the implementation might be pointing to an outdated or incorrect version of the contract.
  Transport Layer Issues: Sometimes, issues in the transport layer or middleware can lead to discrepancies in communication types.
  
  
  Solution:
  
  Check the Service Contract: Review the service contract to confirm the expected communication type