Any idea where SerialVersion disappeared in JBoss 4.0.5 GA? ... It was used to allow 4.0.x hosted clients to invoke EJBs in 3.2.x (<3.2.8) beans, through the use of -Dorg.jboss.j2ee.LegacySerialization. Now there is no mention of such a flag in the code, and thus I'm having problems getting my 4.0.5 GA hosted client to connect without serialization exceptions to a 3.2.6 container (due to serialVersion incompatibilities). Any clue? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4015606#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...