Expression session is undefined on line 11, column 6 in default/header.htm. The problematic instruction: ---------- ==> if session.lang?? [on line 11, column 1 in default/header.htm] in include "header.htm" [on line 2, column 1 in default/message.htm] in include "${templateName}/message.htm" [on line 7, column 9 in exception.html] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression session is undefined on line 11, column 6 in default/header.htm. at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124) at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134) 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:196) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.Environment.include(Environment.java:1375) at freemarker.core.Include.accept(Include.java:155) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.Environment.include(Environment.java:1375) at freemarker.core.Include.accept(Include.java:155) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.IfBlock.accept(IfBlock.java:82) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.MixedContent.accept(MixedContent.java:92) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.Environment.process(Environment.java:176) at freemarker.template.Template.process(Template.java:232) at net.jforum.exceptions.ExceptionWriter.handleExceptionData(ExceptionWriter.java:115) at net.jforum.JForum.handleException(JForum.java:338) at net.jforum.JForum.service(JForum.java:258) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1213) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1154) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145) at net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130) at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:848) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:691) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:654) at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:526) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3574) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:269) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:831) at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:457) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:300) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:271) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214) at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture$1.run(AsyncChannelFuture.java:205) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1551)