I had the same problem. What I did was:
1 - Download Jboss ( www.jboss.org ) 2 - In the directory lib of jboss you can find crimson.jar and jaxp.jar files. 3 - Copy the two files to your $TOMCAT/webapps/yourapp/WEB-INF/lib 4 - Restart tomcat. -----Mensaje original----- De: Viet Kevin [mailto:[EMAIL PROTECTED]] Enviado el: Jueves, 04 de Octubre de 2001 09:52 a.m. Para: [EMAIL PROTECTED] Asunto: tomcat 4.0 and struts problem Hello all : I try to run struts with tomcat 4.0 and get this exception at the startup : java.lang.NullPointerException at org.apache.struts.digester.Digester.parse(Digester.java:755) at org.apache.struts.action.ActionServlet.initMapping(ActionServlet.java:1331) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:465) at net.activia.cmanager.web.actions.CMActionServlet.init(Unknown Source) I find this is weird because all works well with tomcat 3.* Please help me ..., thx in advance