Did you download the IPC sample from Portletswap.com? Some of the calls have changed in the api from 2.2 to 2.4. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970089#3970089 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3970089