When using the resources attribute of fx:include to specify i18n resources for a nested view, Scene Builder will fail to load the main .fxml file. It fails with a MissingResourceException. After working around a related issue (https://javafx-jira.kenai.com/browse/RT-33764), the same application that fails to load in Scene Builder will compile and run as expected.

Below is a link to a sample application that shows the issue. Try opening MainView.fxml using SceneBuilder.

https://dl.dropboxusercontent.com/u/8788282/sample-app-2.zip

A bit more information can be found in this forum post:

https://forums.oracle.com/message/11240449

I also wasn't able to find any definitive documentation for using the resources attribute. I was only able to find a brief reference to it in the fx:include section of the following documentation:

http://docs.oracle.com/javafx/2/api/javafx/fxml/doc-files/introduction_to_fxml.html#include_elements