@dhivyavn,
The error basically means that data does not conform to the output signature defined. Check the schema in the WSDL OR check the output signature in WS - connector at this point - /tns:queryResponse/tns:result/tns:records[2]/ens:Case_CaseNotes_GCC__r/tns:records[0]/ens:CommentLanguage_GCC__- check the properties and constraints and your service needs to adhere to that.
Hope it helps. For a clear solution, attach the WSDL and service response in question.
#webMethods#Service-Designer#Integration-Server-and-ESB