Expression areaMonthPriceDto is undefined on line 98, column 72 in WEB-INF/views/default/frontend/housePriceQuery/queryPage.ftl. The problematic instruction: ---------- ==> if areaMonthPriceDto.transactionPrice?? [on line 98, column 67 in WEB-INF/views/default/frontend/housePriceQuery/queryPage.ftl] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression areaMonthPriceDto is undefined on line 98, column 72 in WEB-INF/views/default/frontend/housePriceQuery/queryPage.ftl. 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.ExistsExpression._getAsTemplateModel(ExistsExpression.java:71) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.Expression.isTrue(Expression.java:138) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:77) 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:237) at com.qfang.freemarker.FreeMarkerViewExt.doRender(FreeMarkerViewExt.java:168) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:233) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1157) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:927) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) at javax.servlet.http.HttpServlet.service(HttpServlet.java:119) at javax.servlet.http.HttpServlet.service(HttpServlet.java:96) at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:109) at com.qfang.filter.QChatFilter.doFilter(QChatFilter.java:55) at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:89) at com.qfang.filter.PageGAFilter.doFilter(PageGAFilter.java:80) at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:89) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:89) at com.qfang.filter.AccessThrottlingFilter.doFilter(AccessThrottlingFilter.java:90) at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:89) at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:156) at com.caucho.server.webapp.AccessLogFilterChain.doFilter(AccessLogFilterChain.java:95) at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:289) at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:811) at com.caucho.network.listen.TcpSocketLink.dispatchRequest(TcpSocketLink.java:1221) at com.caucho.network.listen.TcpSocketLink.handleRequest(TcpSocketLink.java:1177) at com.caucho.network.listen.TcpSocketLink.handleRequestsImpl(TcpSocketLink.java:1161) at com.caucho.network.listen.TcpSocketLink.handleRequests(TcpSocketLink.java:1084) at com.caucho.network.listen.TcpSocketLink.handleAcceptTask(TcpSocketLink.java:907) at com.caucho.network.listen.AcceptTask.doTask(AcceptTask.java:74) at com.caucho.network.listen.ConnectionTask.runThread(ConnectionTask.java:97) at com.caucho.network.listen.ConnectionTask.run(ConnectionTask.java:80) at com.caucho.network.listen.AcceptTask.run(AcceptTask.java:59) at com.caucho.env.thread.ResinThread.runTasks(ResinThread.java:164) at com.caucho.env.thread.ResinThread.run(ResinThread.java:130)