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      if c.id==channel.parentId [on line 32, column 41 in WEB-INF/t/cms/krkj/default/channel/信息类别栏目2.html] in user-directive cms_channel_list [on line 30, column 35 in WEB-INF/t/cms/krkj/default/channel/信息类别栏目2.html] in user-directive cms_channel_list [on line 27, column 19 in WEB-INF/t/cms/krkj/default/channel/信息类别栏目2.html] ---------- Java backtrace for programmers: ---------- freemarker.core.InvalidReferenceException: Expression channel.parentId is undefined on line 32, column 52 in WEB-INF/t/cms/krkj/default/channel/信息类别栏目2.html. at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124) at freemarker.core.ComparisonExpression.isTrue(ComparisonExpression.java:122) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:77) 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.Environment$1.render(Environment.java:235) at com.jetsum.cms.action.directive.ChannelListDirective.execute(ChannelListDirective.java:80) at freemarker.core.Environment.visit(Environment.java:263) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:126) at freemarker.core.Environment.visit(Environment.java:210) at freemarker.core.MixedContent.accept(MixedContent.jav