Check for null values in your Trip object. It gets created when the bean starts. Fine. But what about the object fields in Trip? I'm looking at this: #{selectedTrip.startDate.time}. If selectedTrip.startDate is null, that will result in a data model update error on all fields I believe. Whenever I see data model update, I look at the objects to see if there are null arrays or that kind of thing. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4000135#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...