Error Message: Upgrade fails: HTTP Status 500 - error "DTSC - Please contact Loway for a renewal"

This error is usually caused by an otdated version of the web.xml file. In order to fix it, please follow the procedure below: /etc/init.d/qm-tomcat6 stop
cd /usr/local/queuemetrics/webapps/wombat-0.6.8-448/
cd WEB-INF/
mv web.xml web.xml.old
cp web.xml.ORIG-0.6.8-448 web.xml
/etc/init.d/qm-tomcat6 start (Please note that the WombatDialer version may change based on what is installed on your system)