Hi all. I need your help. I get the following Exception while stateless bean function invocation : javax.ejb.EJBException: java.lang.IllegalArgumentException: Wrong target. class "Implementation Class" for "function signature" it accrues if persistence used inside function. I use Jboss5.0.1 with jdk 1.6 and MySQL 5 thanks in advance. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225009#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...