I solved this problem today, right now. Just adding @IndexColumn in all Entitys i could find (including by editing another developers entitys). But now i'm getting another problem when i added a new WebService: Error creating callback handler for bean erpagronegociows.ws.VendaWS Well, it was working before i add a webservice but now even if i remove it, it is not working anymore =/ Do you have any ideia what could it be? I cleaned all tmp files from jboss (4.2.2 and i cant change, unfortunaly) and restart it. Thank you for your good kindness. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4217899#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...