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FreeMarker template error (DEBUG mode; use RETHROW in production!): The following has evaluated to null or missing: ==> productTypeList [in template "\\front\\gallery.ftl" at line 184, column 40] ---- Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: #list productTypeList as prType [in template "\\front\\gallery.ftl" at line 184, column 33] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.Expression.assertNonNull(Expression.java:217) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:104) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:94) at freemarker.core.Environment.visit(Environment.java:327) at freemarker.core.Environment.visit(Environment.java:333) at freemarker.core.Environment.process(Environment.java:306) at freemarker.template.Template.process(Template.java:386) at org.alex.core.kit.GenerateHtmlKit.GenerateSinglePageFrontHtml(GenerateHtmlKit.java:61) at org.alex.core.kit.GenerateHtmlKit.GennerateGallery(GenerateHtmlKit.java:224) at org.alex.core.kit.MyTask.run(TimerManager.java:56) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505)