Type Exception Report
Message /classroom/classroom_View_Dm.jsp (line: [10], column: [0]) The value for the useBean class attribute [engstime.ArtDmBBS.DmEditor] is invalid.
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: /classroom/classroom_View_Dm.jsp (line: [10], column: [0]) The value for the useBean class attribute [engstime.ArtDmBBS.DmEditor] is invalid. org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42) org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:291) org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:114) org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1379) org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1187) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392) org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444) org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450) org.apache.jasper.compiler.Node$Root.accept(Node.java:471) org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392) org.apache.jasper.compiler.Generator.generate(Generator.java:3664) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:254) org.apache.jasper.compiler.Compiler.compile(Compiler.java:374) org.apache.jasper.compiler.Compiler.compile(Compiler.java:351) org.apache.jasper.compiler.Compiler.compile(Compiler.java:335) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:601) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:368) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Note The full stack trace of the root cause is available in the server logs.