Why would you use toplink instead of Hibernate? AFAIK Seam only support Toplink if you use EJB3. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4124974#4124974 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4124974