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java.lang.ClassCastException: java.lang.Object cannot be cast to ru.runa.wfe.var.file.IFileVariable	at	at	at	at ru.runa.wfe.commons.ftl.FreemarkerTag.exec(	at freemarker.core.MethodCall._getAsTemplateModel(	at freemarker.core.Expression.getAsTemplateModel(	at freemarker.core.Expression.getStringValue(	at freemarker.core.DollarVariable.accept(