A java-progam (.jar) is calling a webservice, written in C#. I'm able to unzip the jarfile to detect which service it is calling, but how do I know the service is listening to that name? Especially it's not documented and I don't have a clue about the name of the wsdl-file. A webservice, written in C#, is calling an Oracle Database. Oracle 9i client has been installed. Message appears: "System.Data.OracleClient requires Oracle client software version 8.1.7 or greater".