title: JavaFX Scene Builder 2.0 "Failed to include '*.fxml' "
body: <p>In Scene Builder, I included many fxml files in Tabs, but now, I can not include any. Also, if I delete my existing fxml file which doesn't have any problem, and then add again by using Scene Builder's  include function(File->Include->FXML..), I get the same error:</p>
  
  <p>"Failed to include '*.fxml' under Tab."</p>
  
  <p><strong>EDIT:</strong>  I get same error in gluon scene builder 8.3.0.</p>