The applications are packaged as follows: one .EAR (A) with 3 stateless session beans one .EAR (B) with 1 stateless session bean and a web-service server deployed in a .WAR. The webservice from (B) reads objects from two of the beans in (A). Requests without 'generics' in the interface work perfectly. And yes, accessing the beans in (B) from jUnit works even with 'generics'. And, by the way, the same configuration works flawlessly on AIX with Websphere 6.1 (SP 11?), so I think it's something JBoss-specific. Thanks, Lorenz View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4123334#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...