I managed to find in a test case in jboss portal sources a class that retrieves the transaction like that: (UserTransaction)new InitialContext().lookup("UserTransaction"); but when I run this code I get Error org.jboss.tm.usertx.client.ServerVMClientUserTransaction ErrorType java.lang.ClassCastException Stacktrace ... Any ideea? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3980131#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...