I thought I'd post my solution to this here as I've spent a day looking for a solution to the same problem, and only finding posts such as this without answers. I have a JBossWS service that I am connecting a legacy Borland C++ app to, and ran into this same problem: the missing namespace. In the WSDL Importer generated code, change the line with RegisterInvokeOptions to: InvRegistry()->RegisterInvokeOptions(__interfaceTypeinfo(MyWebService), (ioDocument, ioLiteral, ioHasNamespace)); | I can't see how to get WSDL Importer to generate this though. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4195997#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...