Sorry, didn't intend to belittle you... :( I have use the IPC mechanism to trigger an action on a remote portlet via WSRP based on the result of an action on a local portlet. As you can see in the documentation, nowhere is it required that the portlets be in the same web application since objects are referred to by their portal names (window name, page name, etc). Maybe you are referring to sharing data via the PortletSession application scope, in which case, you do indeed need to have all the portlets involved in the same web application? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103366#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...