Hi, It looks like the "org.jboss.remoting.transport.http.HTTPMetadataConstants" section in Chapter 5 of the Remoting Guide is somewhat misleading. Unlike the other constants in that section, NO_THROW_ON_ERROR is used only on the client side. It is only after an Exception has been returned from the server that the value of NO_THROW_ON_ERROR is consulted. What you want to do is pass NO_THROW_ON_ERROR as follows: | Client client = new Client(...); | client.connect(); | Object param = ... ; | HashMap metadata = new HashMap(); | metadata.put(HTTPMetadataConstants.NO_THROW_ON_ERROR, "true"); | client.invoke(param, metadata); | Sorry for the confusion. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4050386#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...