Migrate from Javafx2.2 to Javafx8

I am trying to migrate Javafx2.2 application to Javafx8. I am getting following issue while using nested `FXML`: ``` javafx.fxml.LoadException: Root hasn't been set. Use method setRoot() before load. ``` FXML file: ``` <fx:root type="javafx.scene.layout.VBox" xmlns:fx="http://javafx.com/fxml" xmlns="http://javafx.com/javafx/8" fx:controller="com.ui.TestController"> <TextField fx:id="textField"/> <Button text="Click Me"/> </fx:root> ``` Code: ``` FXMLLoader loader = new FXMLLoader(); loader.setResources(bundle); InputStream in = Main.class.getClassLoader().getResourceAsStream(fxml); loader.setBuilderFactory(new JavaFXBuilderFactory()); loader.setLocation(Main.class.getResource(fxml)); Node page = null; try { page = (Node) loader.load(in); } catch (IOException e) { logger.error("{}", e); } finally { try { in.close(); } catch (IOException e) { logger.error("{}", e); } } ``` I need `page` node to set in another `BorderPane.center`. It works with Javafx2.2. What I am missing here? Any help would be appreciated.