I had the same problem. To add some context, there was no problem at deployment with JBoss AS 5.1.0.GA, but it appeared with JBoss EAP 5.0.0
Libraries implied in <JBOSS_HOME>/common/lib :
The lib "JBoss EJB3 Core" contains the classes
I had the same problem.
To add some context, there was no problem at deployment with JBoss AS 5.1.0.GA, but it appeared with JBoss EAP 5.0.0
Libraries implied in <JBOSS_HOME>/common/lib :
The lib "JBoss EJB3 Core" contains the classes