I have increased the perm size to 128m and my report generation now works (for how long im not sure...) I have modified the JAVA_OPTS parameter in my run.conf file to read as follows. JAVA_OPTS="-XX:MaxPermSize=128m -Xms128m -Xmx512m -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000" Id still be interested to find out if Sun Java 6 is ok with this version of JBoss Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4220793#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...