"gus888" wrote : I used following code in converters class:return ((EntityManager) Component.getInstance("em")).find( | | Category.class, Integer.valueOf(arg2)); | then I got the entityManager is null exception. However, after I change "em" to "entityManager", exception disappeared. I find this very hard to believe. By entityManager is null you mean you get an NPE? Or are you trying to use the entityconverter with this? In addition, I ever read a posting which stated the s:selectItems currently doesn't support h:selectOneRadio. Is it correct? since I cannot get it work. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024843#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...