Hi, I have a simple web app as a WAR file. It was developed using Struts and Tiles. My index JSP is composed by some calls to Tiles tags like this: <tiles:insert attribute="header"/> The app works well. But when i defined it as the Jboss context root app it stops to work. I've just see my config files like struts-config.xml, web.xml, tiles-defs.xml and jboss-web.xml and this is OK. Should i do some special configuration on any of this files? This is the error: org.apache.jasper.JasperException: Exception in JSP: /index.jsp:14 11: 12: 13: 14: <tiles:insert attribute="header"/> 15: 16: 17: Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:504) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) root cause java.lang.NullPointerException org.apache.struts.taglib.tiles.InsertTag.processAttribute(InsertTag.java:689) org.apache.struts.taglib.tiles.InsertTag.createTagHandler(InsertTag.java:489) org.apache.struts.taglib.tiles.InsertTag.doStartTag(InsertTag.java:451) org.apache.jsp.index_jsp._jspx_meth_tiles_insert_0(index_jsp.java:186) org.apache.jsp.index_jsp._jspx_meth_html_html_0(index_jsp.java:109) org.apache.jsp.index_jsp._jspService(index_jsp.java:69) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) Can you help me? Regards View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008409#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...