Just a followup observation: it's absolutely clear that Jboss-IDE is ignoring the run.conf file. I made a change to the JAVA_OPTS line in run.conf - in fact put in a syntax error: Exception in thread "main" java.lang.NoClassDefFoundError: jalkfjaslkfjaslfkj This is a fairly serious question, and I'm concerned that it's not being addressed - nowhere in the wiki or in the documentation that I have found. Can someone tell me how to configure JBoss's environment when launched from Eclipse? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970531#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...