"flavia.rainone(a)jboss.com" wrote : - UCL B, associated with b.jar, is in the global repository Forget about UCLB. It doesn't exist in the described scenario. But now I see a test that contains exactly UCLA and UCL B in the repo (with UCL A extending URLCL just as described in the previous post), Here, the registration of UCL A as a dynamic ClassLoader also affects the output of UCLA.loadClass(B), resulting in another failure. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4268904#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...