I am implementing a WS client with JBossWS to access a third-party web service, one of the service operations takes a xsd:anyType type as the parameter, and it gets mapped to SOAPElement in the wstools generated code. When I invoke the service, I got this exception: javax.xml.rpc.JAXRPCException: Cannot obtain serializer factory for: [xmlType={http://www.w3.org/2001/XMLSchema}anyType,javaType=interface javax.xml.soap.SOAPElement] This article (http://wiki.jboss.org/wiki/Wiki.jsp?page=WS4EETypeMapping) talks about how to add type mappings for service endpoint, not the WS client. But anyway, I tried to add file ws4ee-deployment.xml to my client's META-INF folder with following mapping: <typeMapping qname="xsd:anyType" xmlns:xsd="http://www.w3.org/2001/XMLSchema" serializer="org.jboss.ws.jaxrpc.encoding.ElementSerializerFactory" deserializer="org.jboss.ws.jaxrpc.encoding.ElementDeserializerFactory" type="java:javax.xml.soap.SOAPElement" encodingStyle="" /> and it didn't work. Does anyone know a solution to this issue? Much thanks! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4032531#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...