I am using drools 4.0.0 daily snapshot with seam 2.0 daily snapshot. The drools 4.0 M3 WorkingMemory API has been changed. Please have a look here: http://wiki.jboss.org/wiki/Wiki.jsp?page=4.0.0.MR3ReleaseNotes So the code in the RuleBasedIdentity class in the Seam security package should change correspondingly (if the libraries are updated). And the Seam reference Chapter 12 should be changed too. Regards, Ellen View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4062388#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...