Apart from the ones listed in your post, while trying to get the EJB injection working (through -launcher org.jboss.ejb3.client.ClientLauncher) in application client https://www.jboss.org/community/docs/DOC-12835, i also had to add: %JBOSS_HOME%\client\jboss-metadata.jar %JBOSS_HOME%\lib\jboss-kernel.jar %JBOSS_HOME%\lib\jboss-xml-binding.jar %JBOSS_HOME%\lib\jboss-vfs.jar %JBOSS_HOME%\server\default\lib\jboss-ejb3-core.jar I had to add the %JBOSS_HOME%\server\default\lib\jboss-ejb3-core.jar because the %JBOSS_HOME%\client\jboss-ejb3-core-client.jar does not contain one of the required classes present in jboss-ejb3-core.jar. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4183065#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...