I am currently working on an old legacy system that is using jax-rpc. I would like to add in some custom faults such that I can inform clients better. I.E. I can throw custom exceptions/faults such that the user can catch them to determine the best course of action. However using JBoss I have not been able to get this to work. The main problem is that in the SOAP message that comes back there is no <detail> tag. This tag is how the exception would get deserialized on the client, so without that tag the client will have no idea what exception/fault was thrown. Has anyone every gotten a custom fault to work with JBoss? My guess is no as I have not been able to find out anything on this problem. I am running 4.2.3.GA and out of the box is has jbossws-native-3.0.1, I also installed jbossws-native-3.1.1.GA to see if it fixed the problem but I was still out of luck. Please help I am all out of ideas! Below are some code snippets to show what I am talking about. If you need more please let me know. I took a simple example jax-rpc HelloWord service from the java tutorial section and added a fault to the wsdl. Here is a snippet: <portType name="HelloIF"> <operation name="sayHello" parameterOrder="String_1"> <input message="tns:HelloIF_sayHello"/> <output message="tns:HelloIF_sayHelloResponse"/> <fault name="fault" message="tns:sayHelloException"></fault> </operation> </portType> I generated the jax-rpc classes: Here is the fault/exception generated: public class SayHelloException extends java.lang.Exception { private java.lang.String message; public SayHelloException(java.lang.String message) { super(message); this.message = message; } public java.lang.String getMessage() { return message; } } Here is the endpoint interface: public interface HelloIF extends java.rmi.Remote { public java.lang.String sayHello(boolean string_1) throws samples.webservices.jaxrpc.simple.SayHelloException, java.rmi.RemoteException; } I also creating the jax-rpc mapping file and deployed with the war in the web-inf directory as well as my webservices.xml and web.xml. At this point I am not sure why jboss is not creating the <detail> tag in the SOAP message that gets sent back to the server. Here is how I throw the custom exception on the server: throw new SayHelloException("Throwing custom exception/fault from WS"); Here is my client: try { Stub stub = (Stub) port; stub._setProperty(javax.xml.rpc.Stub.ENDPOINT_ADDRESS_PROPERTY, "http://localhost:8080/hello/simple"); String result = port.sayHello(true); System.out.println(result); } catch (SayHelloException ex) { System.out.println("PASS! caught a custom exception"); } catch (RemoteException ex) { } catch (Exception ex) { System.out.println("FAIL! caught a Exception"); } _________________________________________________________________ Windows 7: It works the way you want. Learn more. http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:...