[jboss-user] [EJB/JBoss] - how to solve the problem:http status 500

when you swith the webs very quickly ,you will find the error which is called HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException org.compiere.model.MTab.toString(MTab.java:2282) java.lang.String.valueOf(String.java:2577) java.lang.StringBuilder.append(StringBuilder.java:116) org.compiere.www.WWindowStatus.toString(WWindowStatus.java:75) org.compiere.util.WebEnv.getServletInfo(WebEnv.java:659) org.compiere.util.WebEnv.addFooter(WebEnv.java:490) org.compiere.util.WebUtil.createResponse(WebUtil.java:485) org.compiere.util.WebUtil.createErrorPage(WebUtil.java:109) org.compiere.www.WWindow.doGet(WWindow.java:143) javax.servlet.http.HttpServlet.service(HttpServlet.java:697) javax.servlet.http.HttpServlet.service(HttpServlet.java:810) org.compiere.www.WFilter.doFilter(WFilter.java:142) org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs. Apache Tomcat/5.5.9 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3964231#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...