I saw the exception below using Scene Builder Kit in a sample Eclipse plugin.
I've no clear way to reproduce it yet.


GRAVE: Bug
java.lang.RuntimeException: Failed to load /com/oracle/javafx/scenebuilder/kit/editor/panel/inspector/editors/DoubleAutoSuggestEditor.fxml
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.EditorUtils.loadFxml(EditorUtils.java:483)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.EditorUtils.loadFxml(EditorUtils.java:463)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.AutoSuggestEditor.preInit(AutoSuggestEditor.java:128)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.AutoSuggestEditor.<init>(AutoSuggestEditor.java:99)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.DoubleEditor.<init>(DoubleEditor.java:56)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.makeOrResetPropertyEditor(InspectorPanelController.java:1725)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.makePropertyEditor(InspectorPanelController.java:1689)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.getPropertyEditor(InspectorPanelController.java:1378)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.getInitializedPropertyEditor(InspectorPanelController.java:774)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.buildSection(InspectorPanelController.java:745)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.buildExpandedSection(InspectorPanelController.java:668)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.rebuild(InspectorPanelController.java:633)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.updateInspector(InspectorPanelController.java:587)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.InspectorPanelController.editorSelectionDidChange(InspectorPanelController.java:493)
at com.oracle.javafx.scenebuilder.kit.editor.panel.util.AbstractPanelController$6.changed(AbstractPanelController.java:250)
at com.oracle.javafx.scenebuilder.kit.editor.panel.util.AbstractPanelController$6.changed(AbstractPanelController.java:245)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:361)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.IntegerPropertyBase.fireValueChangedEvent(IntegerPropertyBase.java:106)
at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:113)
at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:146)
at com.oracle.javafx.scenebuilder.kit.editor.selection.Selection.incrementRevision(Selection.java:506)
at com.oracle.javafx.scenebuilder.kit.editor.selection.Selection.endUpdate(Selection.java:454)
at com.oracle.javafx.scenebuilder.kit.editor.selection.Selection.select(Selection.java:370)
at com.oracle.javafx.scenebuilder.kit.editor.selection.Selection.select(Selection.java:101)
at com.oracle.javafx.scenebuilder.kit.editor.selection.Selection.select(Selection.java:90)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.gesture.mouse.SelectAndMoveGesture.mousePressed(SelectAndMoveGesture.java:122)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.gesture.mouse.AbstractMouseDragGesture.start(AbstractMouseDragGesture.java:112)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.mode.EditModeController.activateGesture(EditModeController.java:980)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.mode.EditModeController.mousePressedOnGlassLayer(EditModeController.java:747)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.mode.EditModeController.access$300(EditModeController.java:96)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.mode.EditModeController$4.handle(EditModeController.java:555)
at com.oracle.javafx.scenebuilder.kit.editor.panel.content.mode.EditModeController$4.handle(EditModeController.java:552)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3669)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3397)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1673)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2406)
at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$null$266(EmbeddedScene.java:250)
at com.sun.javafx.tk.quantum.EmbeddedScene$$Lambda$377/1138249201.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.EmbeddedScene.lambda$mouseEvent$267(EmbeddedScene.java:238)
at com.sun.javafx.tk.quantum.EmbeddedScene$$Lambda$362/1977202492.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$147(PlatformImpl.java:288)
at com.sun.javafx.application.PlatformImpl$$Lambda$100/1696962359.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$148(PlatformImpl.java:287)
at com.sun.javafx.application.PlatformImpl$$Lambda$99/1299829127.run(Unknown Source)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:4984)
at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5362)
at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
at org.eclipse.swt.internal.cocoa.NSApplication.nextEventMatchingMask(NSApplication.java:94)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3650)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1152)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1033)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:635)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:578)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:379)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:233)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
Caused by: javafx.fxml.LoadException:
/com/oracle/javafx/scenebuilder/kit/editor/panel/inspector/editors/DoubleAutoSuggestEditor.fxml

at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2593)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2563)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2433)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2401)
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.EditorUtils.loadFxml(EditorUtils.java:481)
... 93 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2558)
... 96 more
Caused by: java.lang.NullPointerException
at com.oracle.javafx.scenebuilder.kit.editor.panel.inspector.editors.AutoSuggestEditor.initialize(AutoSuggestEditor.java:142)
... 106 more