Mosaico | Mosaico is an SBT-based build kit for cloud deployments | Continuous Deployment library

list(generator) usually works :)

Yes, the Location is required exception means that the resource passed into the FXMLLoader.load(...) method was null—i.e. not on your classpath.

It could be that you have supplied the wrong path or that you're using the wrong classloader or that you have misconfigured your classpath when you run the application. Perhaps that file is in your source folder but not being copied into the classes folder?

It's hard to debug from here. You need to work out where that .fxml file is located and make sure that it is on the classpath.

Alternatively, you could load it from a file. E.g.

Well, because of how it is built sankeyNetwork, you need to start from 0 in your links. As you can see from landuse, your data start from 3.

You can reindex link to start from 0:

I am not sure what is the exact issue you are facing. Firstly FileChooser is not a Button. It is a helper class to interact with ToolKit to open the OS specific file chooser and return the results. And obvisously, it will no keep record of the returned results.

It is your duty to keep a reference of the retrieved file. This can be done in "N" number of ways. As you question focuses on get getting the value from the open button, I would suggest the below approach.