Obviously hibernate is trying to execute "select u.username from com.vds.seamregistration.bean.User u where u.username=#{user.username}". Most likely you are using something like: | em.createQuery("select u from User u where u.username=#{user.username}").getSingleResult(); | in the register method. You should be using something like: | em.createQuery("select u from User u where u.username=:username").setParameter("username",user.username).getSingleResult(); | where user must be injected in the register bean. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4045740#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...