Which version of JBoss AS? In 5.1 the JAVA_OPTS are in run.conf.bat. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264926#4264926 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4264926