Sometimes Scene Builder in JavaFX doesn't open

Even though this question has been asked some time ago, I want to contribute my solution to this problem because it differs from the other solutions and in addition is very simple.

This particular problem happened to me just a few mins ago and all I took to solve was maximizing the actual Scenebuilder window!

• Open the Windows Taskmanager
• Switch to the applications tab
• Right click the SceneBuilder (named: yourFileName.fxml)
• Select 'Maximize'

Description above works for Windows OS, on other OS the corresponding application managing program should do the same.

That worked for me just perfect. No copying and/or overwriting needed.

Its not the perfect answer but it works well. Try doing the following

1.Open scene builder directly from your local drive.

2.Click on File-> Open Recent -> Clear Menu

Then try to open up your fxml. Works fine for me.