I got the Guvnor component of Drool 5M5 working with Tomcat 6.0 by doing the following (but it doesn't seem to work for Drools 5CR1): Remove tomcat-6.x\webapps\drools-guvnor\WEB-INF\lib\el-api-x.jar Remove existing tomcat-6.x\lib\jsf-api.jar and jsf-impl.jar Replace with contents of jboss_jsf_libs.zip (downloaded from http://download.jboss.org/drools/dependencies/jboss_jsf_libs.zip) Edit 'repositoryConfiguration' in webapps\drools-guvnor\WEB-INF\components.xml to point to a directory that exists John S