Verify if your <error-page> tags are defined before any <taglib> tag. Tomcat 4 not allows to declare taglib before error-page, even though tomcat 3 accepts it.
> -----Message d'origine----- > De: Viet Kevin [SMTP:[EMAIL PROTECTED]] > Date: jeudi 4 octobre 2001 16:52 > À: [EMAIL PROTECTED] > Objet: 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