SOAP MappingException 204

Hi SDN,

We have some errors at the Adaptor Engine level in SAP PI.

Some messages are flowing good and some are failing with MappingException: 204.

Error Message - "Transmitting the message to endpoint <local> using connection SOAP_http://sap.com/xi/XI/System failed, due to: com.sap.aii.af.service.mapping.MappingException: 204"

Could you please help in resolving this problem.

Thanks

Naresh N