I have | <types> | <schema ...> | <complexType name="paraListType"> | <sequence> | <element name="username" type="string" nillable="true"/> | <element name="password" type="string" nillable="true"/> | <element name="operationName" type="string" nillable="true"/> | <element name="inputXML" type="string" nillable="true"/> | </sequence> | </complexType> | <complexType name="responseType"> | <sequence> | <element name="result" type="string" nillable="true"/> | </sequence> | </complexType> | <element name="paraList2" type="tns:paraListType"/> | <element name="responseXML" type="tns:responseType"/> | </schema> | </types> | <message name="attachRequest"> | <part name="parameters" element="ns2:paraList2"/> | <part name="attachmentContents" type="xsd:string"/> | </message> | <message name="attachResponse"> | <part name="result" element="ns2:responseXML"/> | </message> | <portType name="TransmulatorInterface"> | <operation name="invokeAttach"> | <input message="tns:attachRequest"/> | <output message="tns:attachResponse"/> | </operation> | </portType> | When running tools I get | Exception in thread "main" org.jboss.ws.WSException: Unable to unwrap parameters, wrapper element name must match operation name. operationName=invokeAttach elementName=paraList2 | at org.jboss.ws.tools.WSDLToJava.appendParameters(WSDLToJava.java:421) | at org.jboss.ws.tools.WSDLToJava.appendDocParameters(WSDLToJava.java:387) | Do we have a reference to the relevant part in a spec? Generally, we please document (read MUST) why we make assertions like this. A future version of the spec might invalidate the assertion. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4000809#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...