If I edit my initial state file to remove everything, and then try saving in the IDE, it tells me the save failed due to a null pointer exception. Here's the top of the stack trace:

java.lang.NullPointerException at org.ops.ui.editor.swt.NddlContentProvider.reload(NddlContentProvider.java:78) at org.ops.ui.editor.swt.NddlEditor.editorSaved(NddlEditor.java:88) at org.eclipse.ui.texteditor.AbstractTextEditor.performSave(AbstractTextEditor.java:4880) at org.eclipse.ui.texteditor.AbstractTextEditor.doSave(AbstractTextEditor.java:4668) at org.eclipse.ui.texteditor.AbstractTextEditor$TextEditorSavable.doSave(AbstractTextEditor.java:7003) at org.eclipse.ui.Saveable.doSave(Saveable.java:214)

Obviously this is a minor cleanup item, but also hopefully easy to fix.

Should work now