im using jboss-4.0.5.GA i have an Exception when deploy a ADF project the Exception is : org.apache.jasper.JasperException org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370) 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) com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322) com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87) com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117) javax.faces.webapp.FacesServlet.service(FacesServlet.java:198) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) root cause java.lang.NullPointerException javax.faces.webapp.UIComponentTag.setupResponseWriter(UIComponentTag.java:615) javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:217) org.apache.myfaces.taglib.core.ViewTag.doStartTag(ViewTag.java:71) org.apache.jsp.untitled1_jsp._jspx_meth_f_view_0(org.apache.jsp.untitled1_jsp:84) org.apache.jsp.untitled1_jsp._jspService(org.apache.jsp.untitled1_jsp:60) 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:322) 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) com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322) com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130) com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87) com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200) com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117) javax.faces.webapp.FacesServlet.service(FacesServlet.java:198) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) ............................ but when i read ADF installer for JBoss thy told me to remove this folders from JBoss : deploy/jbossweb-tomcat55.sar/jsf-lib/ tmp, log, and data directories (located at the same level as the deploy directory) ................................. ............................ ( note : even if u delete these folders ( tmp, log, and data) JBoss recreate it when restarting ) so that what i did but it throw new Exception : that is : .................. description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: org.apache.myfaces.taglib.core.ViewTag org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) 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 javax.servlet.ServletException: org.apache.myfaces.taglib.core.ViewTag org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:843) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:776) org.apache.jsp.res_jsp._jspService(res_jsp.java:83) 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:334) 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.NoClassDefFoundError: org.apache.myfaces.taglib.core.ViewTag org.apache.jsp.res_jsp._jspx_meth_f_view_0(res_jsp.java:95) org.apache.jsp.res_jsp._jspService(res_jsp.java:76) 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:334) 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) .................................. so anybody know any soluation for this problem ... thankx for helping View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4041949#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...