I don't think this is necessairly related just to IPC portlets. I have noticed that when I remove a war file containing my portlets that the portal doesn't automatically clean up references to that portal. And then all kinds of errors and warnings show up. I think that the way to cleanly remove a portlet is: 1) Remove the portlet windows from all pages. 2) Delete the portlet instances (might automatically do step 1, I'll have to try this). 3) Remove the war/sar file. I haven't tried this yet (emphasis on "yet", it is on my list of things to try this weekend). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3971954#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...