Hello, I used Dynamic Invocation Interface (DII) in web services client. Configuration Details: 1. JBOSS portal 2.4: using this portal, i'm performing web services invocation. The web services is running in another machine using webobjects framework. 2. Please refer the below client code i used, URL url = new URL(urlstr); String ns = "http://vg0601f-dhcp147.apple.com:9999/cgi-bin/WebObjects/ProvisioningWebServices.woa/ws/ProvisioningWS"; QName qname = new QName(ns, "ProvisioningWS"); QName port = new QName(ns, "ProvisioningWS"); QName operation = new QName(ns,"selectAuthorizedItemsForMerlin"); ServiceFactory factory = ServiceFactory.newInstance(); Service service = factory.createService(url, qname); Call call = service.createCall(port, operation); System.out.println("After gettting the call "+call); Object o = call.invoke(new Object[] {argument}); I got the o/p until "After gettting the call" and call object also is not null. But while executing the invoke method call.invoke(new Object[] {argument}) , i'm getting the below error: 15:27:33,586 ERROR [STDERR] java.lang.ClassCastException: org.jboss.ws.soap.SOAPMessageImpl 15:27:33,589 ERROR [STDERR] at com.sun.xml.rpc.client.dii.CallInvokerImpl._postSendingHook(CallInvokerImpl.java:305) 15:27:33,589 ERROR [STDERR] at com.sun.xml.rpc.client.StreamingSender._send(StreamingSender.java:324) 15:27:33,589 ERROR [STDERR] at com.sun.xml.rpc.client.dii.CallInvokerImpl.doInvoke(CallInvokerImpl.java:103) 15:27:33,590 ERROR [STDERR] at com.sun.xml.rpc.client.dii.BasicCall.invoke(BasicCall.java:492) 15:27:33,590 ERROR [STDERR] at org.jboss.rpc.WSClient.WSClient.getWSOutput(WSClient.java:39) 15:27:33,590 ERROR [STDERR] at org.jboss.porlet.iproject.iprojectportlet.doView(iprojectportlet.java:25) 15:27:33,590 ERROR [STDERR] at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:167) 15:27:33,590 ERROR [STDERR] at javax.portlet.GenericPortlet.render(GenericPortlet.java:407) PLease help me to resolve this issue. Thanks, Elangovan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983953#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...