Thanks, that worked! But I have got another problem now. To avoid changing the existing stateless beans, for each, I have created a wrapper sort of stateless bean having the web service annotations and calling the methods in the existing beans. (This had to be done since the client app can't recognize many of the objects taken as parameters by methods of the existing beans.) But calling a method from the wrapper bean having a createQuery statement throws a NullPointerException. Any idea on why this might be? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4170358#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...