In a new test written by Scott, the VFS is asked to get a root that doesn't exist. The VFS gives an unhelpful message for this | ava.lang.IllegalArgumentException: Null root, rootURI: file:/home/ejort/jboss-cl/classloading-vfs/target/tests-classes/org/jboss/test/class | loading/vfs/lib.jar, file: /home/ejort/jboss-cl/classloading-vfs/target/tests-classes/org/jboss/test/classloading/vfs/lib.jar | at org.jboss.virtual.plugins.context.file.FileSystemContext.<init>(FileSystemContext.java:184) | at org.jboss.virtual.plugins.context.file.FileSystemContext.<init>(FileSystemContext.java:156) | at org.jboss.virtual.plugins.context.file.FileSystemContextFactory.getVFS(FileSystemContextFactory.java:65) | at org.jboss.virtual.VFS.getVFS(VFS.java:89) | at org.jboss.virtual.VFS.getRoot(VFS.java:103) | This error message needs improving. It should be lib.jar doesn't exist. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4166634#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...