Got it now -- I don't think it was not so nice : several internal redirections may have happens (since I can see the get and set methods called several times). In order not to lost the value of my bean variable, I have to let it not be set if the Query variable is null. I think this part of the implementation of SEAM is problemlic, or at least not very nice. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048550#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...