Hi Andrew, Ok, I've added to HTTPClientInvoker a variable, "unmarshalNullStream", which controls the behavior when there is a null InputStream (or ErrorStream). If "unmarshalNullStream" is set to "true" (the default value), HTTPClientInvoker will call UnMarshaller.read() in the case of a null InputStream. If it is set to false, then HTTPClientInvoker will skip the call to UnMarshaller.read(). Also, I've attached an updated jboss-remoting.jar to JBREM-1046. Please let me know if the latest changes solve your problem. By the way, I've made these changes in Remoting version 2.5 only. Is there a chance that JBossWebServices would encounter the same problem in AS 4.2 (which uses Remoting version 2.2.x)? -Ron View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4184989#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...