This happens, both, when I run the client in Eclipse or by using Ant. All the client classes, including the one with main() method are packaged in a jar file which is included in the classpath. I place jndi.properties in c:\Temp and specify c:\Temp in classpath. It seems that this properties file is visible because the exception does mention the NamingContextFactory. If this file is not visible I get the error saying that the environment property should be specified. I'd like to have this property file outside a jar so it can be replaced without replacing the jar. I'd appreciate any ideas. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993936#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...