Cause
This error occurs if an incoming Web message refers to an exposure list that does not exist in the current version of the Web service. This can occur if the Web service user is using an outdated version of the WSDL for the service.
A SOAP error response is sent back to the Web service user, and processing continues.
Action
Check that the Web service user is using an up-to-date version of the WSDL for the service.