Expression requestParameters.root_category_id is undefined on line 58, column 14 in categorydetail.ftl. The problematic instruction: ---------- ==> if-else [on line 58, column 9 in categorydetail.ftl] in user-directive renderSubcategories [on line 97, column 5 in categorydetail.ftl] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression requestParameters.root_category_id is undefined on line 58, column 14 in categorydetail.ftl. at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124) at freemarker.core.ComparisonExpression.isTrue(ComparisonExpression.java:121) at freemarker.core.IfBlock.accept(IfBlock.java:80) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179) at freemarker.core.Environment.visit(Environment.java:417) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:179) at freemarker.core.Environment.visit(Environment.java:417) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.Macro$Context.runMacro(Macro.java:172) at freemarker.core.Environment.visit(Environment.java:603) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:106) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.Environment.process(Environment.java:190) at freemarker.template.Template.process(Template.java:237) at org.ofbiz.base.util.template.FreeMarkerWorker.renderTemplateAtLocation(FreeMarkerWorker.java:193) at org.ofbiz.widget.screen.HtmlWidget.renderHtmlTemplate(HtmlWidget.java:85) at org.ofbiz.widget.screen.HtmlWidget$HtmlTemplate.renderWidgetString(HtmlWidget.java:121) at org.ofbiz.widget.screen.HtmlWidget.renderWidgetString(HtmlWidget.java:68) at org.ofbiz.widget.screen.ModelScreenWidget$PlatformSpecific.renderWidgetString(ModelScreenWidget.java:809) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:247) at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:136) at org.ofbiz.widget.screen.ModelScreenWidget$IncludeScreen.renderWidgetString(ModelScreenWidget.java:397) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:247) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:247) at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:136) at org.ofbiz.widget.screen.ModelScreenWidget$IncludeScreen.renderWidgetString(ModelScreenWidget.java:397) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSection.renderWidgetString(ModelScreenWidget.java:524) at org.ofbiz.widget.screen.ModelScreenWidget$SectionsRenderer.render(ModelScreenWidget.java:186) at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorSectionInclude.renderWidgetString(ModelScreenWidget.java:556) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:302) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:302) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:302) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Container.renderWidgetString(ModelScreenWidget.java:302) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:247) at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:136) at org.ofbiz.widget.screen.ModelScreenWidget$DecoratorScreen.renderWidgetString(ModelScreenWidget.java:492) at org.ofbiz.widget.screen.ModelScreenWidget.renderSubWidgetsString(ModelScreenWidget.java:154) at org.ofbiz.widget.screen.ModelScreenWidget$Section.renderWidgetString(ModelScreenWidget.java:247) at org.ofbiz.widget.screen.ModelScreen.renderScreenString(ModelScreen.java:136) at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:108) at org.ofbiz.widget.screen.ScreenRenderer.render(ScreenRenderer.java:93) at org.ofbiz.widget.screen.ScreenWidgetViewHandler.render(ScreenWidgetViewHandler.java:81) at org.ofbiz.webapp.control.RequestHandler.renderView(RequestHandler.java:724) at org.ofbiz.webapp.control.RequestHandler.doRequest(RequestHandler.java:450) at org.ofbiz.webapp.control.ControlServlet.doGet(ControlServlet.java:188) at javax.servlet.http.HttpServlet.service(HttpServlet.java:595) at javax.servlet.http.HttpServlet.service(HttpServlet.java:688) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.ofbiz.webapp.control.ContextFilter.doFilter(ContextFilter.java:251) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Error rendering included template at location [component://medicanimal/webapp/ecommerce/catalog/categorydetail.ftl]: freemarker.core.InvalidReferenceException: Expression requestParameters.root_category_id is undefined on line 58, column 14 in categorydetail.ftl.