Does your dataList have the @DataModel annotation? I believe this is required in order to allow things to be passed around properly, at least from my experience when I had a similar problem with null objects being passed in. In your class for the ricercaMenu bean, you should have something like : @DataModel private List dataList; This will tell seam to generate a datamodel for your dataList List, and facilitates the passing of the list item to the ricerca.begin procedure. Does your example work with a h:dataTable ? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4035436#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...