Hi, After hunting this bug for three days, i've found the solution ; the problem comes when you don't define a seam.properties in your ejb jar (should be an empty file). The error message should be more explicit ; a test which displays an error message if the file seam.properties does not exist should be valuable. Can you confirm ? Sébastien View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4045978#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...