Hi Stefan, I have exactly the same problem. It had already existed when I used the JBossTools predecessor Exadel Studio Pro. Some XML parsing routine seems to have a problem when encountering XML entity references. Any help in this matter would be greatly appreciated since all my Eclipse projects are marked with a red "x". This makes it hard to distinguish between "real" and "unjustified" errors. Kind regards, Matthias View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071241#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...