java.lang.NullPointerException
        at org.netbeans.modules.form.HandleLayer$ComponentDrag.isTopComponent(HandleLayer.java:1673)
        at org.netbeans.modules.form.HandleLayer$ComponentDrag.init(HandleLayer.java:1802)
        at org.netbeans.modules.form.HandleLayer$NewComponentDrag.init(HandleLayer.java:2234)
        at org.netbeans.modules.form.HandleLayer$NewComponentDrag.<init>(HandleLayer.java:2176)
        at org.netbeans.modules.form.HandleLayer.mouseMoved(HandleLayer.java:1464)
        at java.awt.Component.processMouseMotionEvent(Component.java:5533)
        at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3144)
        at java.awt.Component.processEvent(Component.java:5257)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3905)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
[catch] at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)