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Expression currChannel is undefined on line 3, column 10 in templet/e787f930-54de-4fab-8bd7-c110720a8827/questionInfo.html. The problematic instruction: ---------- ==> ${currChannel.name} [on line 3, column 8 in templet/e787f930-54de-4fab-8bd7-c110720a8827/questionInfo.html] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression currChannel is undefined on line 3, column 10 in templet/e787f930-54de-4fab-8bd7-c110720a8827/questionInfo.html. at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:125) at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:135) at freemarker.core.Dot._getAsTemplateModel(Dot.java:78) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.Expression.getStringValue(Expression.java:93) at freemarker.core.DollarVariable.accept(DollarVariable.java:76) at freemarker.core.Environment.visit(Environment.java:221) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:221) at freemarker.core.Environment.process(Environment.java:199) at freemarker.template.Template.process(Template.java:259) at cn.freeteam.cms.util.FreeMarkerUtil.createWriter(FreeMarkerUtil.java:166) at cn.freeteam.cms.util.FreeMarkerUtil.createWriter(FreeMarkerUtil.java:155) at cn.freeteam.cms.action.web.TempletController.templetPro(TempletController.java:76) at cn.freeteam.cms.action.web.TempletController.templet_pro(TempletController.java:83) at sun.reflect.GeneratedMethodAccessor860.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:947) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:878) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at cn.freeteam.filter.VisitFilter.doFilter(VisitFilter.java:179) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:115) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:905) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:595) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2036) at java.lang.Thread.run(Thread.java:619)