"FrankTheTank" wrote : Are the classes used by both still the same? | | The naming of the ear should not be an issue. The contents are important. | | The error looks to happen here: | | | at $Proxy120.notifyPaymentFailed(Unknown Source) | | | Did anything change here? | And by that I do not only mean the method but the classes used in the method. No, I didn´t change the method notifyPaymentFailed. This is a EJB method of my application A. The proxy is used because I am using a JMX to call the EJB method. I didn´t change nothing in application A, and the application A has only the client of application B. The classes aren´t the same. Tkz Frank! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4143563#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...