thanks a lot, I didn't remember to look there. Still when I change the Booking example @DataModel | private List<Hotel> hotels; to something like @DataModel | private List<Hotel> getHotels{..} I get a very big stacktrace of the same type as above. I had preferred to call a method, but knowing this workaround is better than nothing. This is actually a migration issue from Seam 1.2.1 to 2, amd I'm still thinking it's a bug as the behaviour is far from expected. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4068431#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...