For others having failed to install 5.4.2 and dont mind starting from scratch with 5.4.1, here is a summary of the procedure on how to clean up after the failed 5.4.2 install and how to install 5.4.1: These lines completely purge xwiki including your pages(!) from your disk: sudo apt-get remove --purge xwiki-enterprise-common sudo mysql -u root -e "drop database xwiki" sudo rm -rf /var/lib/xwiki This line installs 5.4.1 without errors: sudo apt-get install xwiki-enterprise-tomcat7-mysql=5.4.1 xwiki-enterprise-common=5.4.1 xwiki-enterprise-tomcat-common=5.4.1 xwiki-enterprise-mysql-common=5.4.1 sudo pico /etc/default/tomcat7 edit: JAVA_OPTS="-Djava.awt.headless=true -Xmx512m -XX:MaxPermSize=192m -XX:+UseConcMarkSweepGC" sudo /etc/init.d/tomcat7 restart Visit http://192.168.1.250:8080/xwiki to complete the install. This can probably be followed by an upgrade to 5.4.2, but I am not certain of the procedure. I do assume that it can be performed without having to backup the contents of the wiki, i.e. you can do it whenever you like. -- View this message in context: http://xwiki.475771.n2.nabble.com/Install-interrupted-tp7589489p7589745.html Sent from the XWiki- Users mailing list archive at Nabble.com.