User development, A new message was posted in the thread "Persistence unit issues when migrating to JBOSS 5.1.0": http://community.jboss.org/message/520608#520608 Author : Dragos Bobes Profile : http://community.jboss.org/people/dbobes Message: -------------------------------------------------------------- @LocalBinding solved the lookup problem. Right now the lookup works in both JBOSS 5 and JBOSS 4.   I am still placing the persistence.xml in the ear's META-INF as this is the only way to have the persistence unit shared between ear's modules. I just have to be careful to change the <jar-file> tag to 'myapp.ear/myseammodule.jar' when I deploy it on windows and to 'myseammodule.jar' when I deploy it in unix. -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/520608#520608