OK, so I am a newbie... I've got the example from chapter 12 running -- the Hello example -- that passes a string. I'd like to modify the example to pass in say 2 strings, and return a complex type that is made up of ints and strings. I am using JBoss 4.2.0, and JWSDP 2. I think I've gotten a long way (I can at least invoke the service) but I am getting serialization errors (null ptr error) from com.sun.xml.rpc.encoding.DynamicInternalTypeMappingRegistry.getSerializer() - where the cause is emanating from com.sun.xml.rpc.encoding.literal.ValueTypeLiteralSerializer.doSetTargetClass(). What I am wondering is if I can really use the same approach that the Hello example used (i.e., ServiceFactory.createService, service.getPort, and then invoke my service method), or if I really need to use another API to pass complex types. Any help would be appreciated! Norm View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4166716#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...