Hi, most things seem to be straight forward to follow using the aproach detailed in http://wiki.jboss.org/wiki/Wiki.jsp?page=JbpmOnTomcat, but on tomcat 5.0.28 I am getting the following error when accessing the webapp... 2007-07-16 11:30:03 StandardContext[/jbpm-console]Error configuring application listener of class com.sun.faces.config.ConfigureListener java.lang.NoClassDefFoundError: javax/el/ExpressionFactory at java.lang.Class.getDeclaredConstructors0(Native Method) at java.lang.Class.privateGetDeclaredConstructors(Class.java:2328) at java.lang.Class.getConstructor0(Class.java:2640) at java.lang.Class.newInstance0(Class.java:321) at java.lang.Class.newInstance(Class.java:303) Am I required to use a later version than 5.0.28 which is what my company are currently standardised on, or is there a jar file I can simply put in place to fix this ? Thanks for your help, Ross View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064484#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...