After modeling a web service operation using the Web Service to Source Importer, I previewed the wrapper procedure from Designer and encountered the following error in Teiid:

14:26:03,175 INFO [ReflectionServiceFactoryBean] Creating Service

teiid from class org.apache.cxf.jaxws.support.DummyImpl
14:26:03,177 INFO [ConfigurerImpl] Could not determine bean name for instance of class org.apache.cxf.jaxws.DispatchImpl.
14:26:05,681 WARN [PROCESSOR] Processing exception 'Error building Source for context item.' for request 8GKEIB7qIorN.0. Exception type org.teiid.core.TeiidProcessingException thrown from org.teiid.query.processor.relational.XMLTableNode.processRow(XMLTableNode.java:287). Enable more detailed logging to see the entire stacktrace.

The web service WSDL is: http://www.oorsprong.org/websamples.countryinfo/CountryInfoService.wso?WSDL
The operation modelled and executed was "FullCountryInfoAllCountries"