Kabir, On AS5, I see that the JBoss5ClassPoolFactory is the default factory used if there is no class pool defined. At Branch5_x. I see that the classpool factory is defined as JBossClDelegatingClassPoolFactory. So, is JBoss5CPF ever used? Another question, I didn't get what is TempClassPool for (except for the convert references part) and when is it used. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4242864#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...