"jglan" wrote : I tried to find out more about the classpath container thing. The eclipse help was not very helpful for me. | Is there some file that 'is' the classpath containter to see which jars are referenced ? | If yes, where can find the file ? (to see an example) | Are there other ways to see content of the classpath container ? | | Thanks for any comments! Lets say you have your workspace in the directory ~/workspace. Lets say furthermore that you have a project called test-jbpm (like i did) living at ~/workspace/test-jbpm. You can see the classpath container (and this is what was causing my problem) by looking at ~/workspace/test-jbpm/.classpath I was referencing a non-existant jbpm instance there. Killing that project got me past eclipse complaining on startup. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3963665#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...