I'm working on getting the SeamVFSClassloadingTestCase you sent in the jbossas testsuite since it uses the ULR and the full seam deployment ears. Its certainly not correct currently in that its just passing in the ear root URL to the class loader. I'll first just create a simple URLClassLoader that that has all of the vfs urls for the ear classpath elements to validate the basics. That test can be reproduced in the vfs project with a similar equivalent nested archive structure. No reason to be pulling in the full seam examples there. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4117770#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...