"max.andersen(a)jboss.com" wrote : and what if you do a Project/Clean... for all projects ? I did an eclipse -clean, then a clean inside the project and now I get an error regarding the build path: =============================================== Severity and Description Path Resource Location Creation Time Id Build path contains duplicate entry: 'C:jbossas/server/default/lib/mail.jar' for project 'TestSeamWAR-ejb' TestSeamWAR-ejb Build path 1199904226800 9 =============================================== I did not change anything after the project was created. The WAR and the test projects cannot be built since they depend on the ejb project. The only plugin installed in this Eclipse is JBoss Tools. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4118432#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...