Expression videos[i] is undefined on line 178, column 97 in hotVideos.ftl. The problematic instruction: ---------- ==> assignment: imgURL=videos[i].firstServerPath+"comimage/"+videos[i].createTime?string('yyyy-M-d')+"/"+"union_" + user.id + "_" + videos[i].id+".jpg" [on line 178, column 81 in hotVideos.ftl] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression videos[i] is undefined on line 178, column 97 in hotVideos.ftl. 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.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.AddConcatExpression._getAsTemplateModel(AddConcatExpression.java:77) at freemarker.core.Expression.getAsTemplateModel(Expression.java:89) at freemarker.core.Assignment.accept(Assignment.java:90) 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.IteratorBlock$Context.runLoop(IteratorBlock.java:172) at freemarker.core.Environment.visit(Environment.java:351) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:95) at freemarker.core.Environment.visit(Environment.java:196) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79) 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 com.dreamwin.freemarker.pages.Page.process(Page.java:47) at com.dreamwin.freemarker.pages.VideosPage.processFile(VideosPage.java:52) at com.dreamwin.freemarker.pages.HotVideosPage.processDatas(HotVideosPage.java:89) at com.dreamwin.dwr.ShowZoneManager.generateShowZone(ShowZoneManager.java:383) at com.dreamwin.servlet.GenerateAll.doGet(GenerateAll.java:23) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at com.dreamwin.base.UnicodeFilter.doFilter(UnicodeFilter.java:53) 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.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:754) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:876) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Unknown Source)