I had to add these JAR files to the lispwebapp WAR file (http://downloads.sourceforge.net/abcl-web/lispwebapp-0.0.1.war) to get past a couple errors that came up when running "Execute": cp commons-logging-1.1.2/commons-logging-1.1.2.jar WEB-INF/lib cp xerces-2_11_0/xercesImpl.jar WEB-INF/lib After that I was good to go!