(1) probably some built in view of your database (2) do not know. you would need to show the full error message/stack trace for me to see what is causing it (3) views (or tables) without a primarykey is currently handled by letting all columns be the composite-id. That gives problems for seam-gen pre seam 1.1.6, but is fixed in cvs so you should get better mileage there. That being said I think we need to start ignoring/skipping table/views without a proper identification. see http://opensource.atlassian.com/projects/hibernate/browse/HBX-883 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4018687#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...