Based on the list, most the jar files are already provided by JBoss, so copying should not be necessary. However, if you need your own version of those jar files, then you need to go for classloader scoping of your application. anonymous wrote : copy the libs from vectrics/vectrics-lib/runtime into the directory server/default/lib Copying these jar files isn't a good step. They overwrite the ones provided by the server and can end up in messing up the system. If at all you need all these jars to be included in your application, then follow this wiki (i know, for JBoss-5.x its recommended to use jboss-classloading.xml, but the documentation is not yet available and since you are new to JBoss, its better to have a look at the earlier classloading wiki): https://www.jboss.org/community/docs/DOC-9288 http://www.jboss.org/community/docs/DOC-10290 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4201333#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...