Hi jakiran There is already a jndi.properties file in my C:\Program Files\jboss-4.2.2.GA\server\default\conf folder with the normal 4 lines : DO NOT EDIT THIS FILE UNLESS YOU KNOW WHAT YOU ARE DOING. I haven't touched this jndi.properties file at all so could you be more specific as to how to add this file to my client JPA classpath in Eclipse? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4198411#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...