java.lang.NullPointerException
        at
javax.swing.OverlayLayout.preferredLayoutSize(OverlayLayout.java:110)
        at java.awt.Container.preferredSize(Container.java:1558)
        at java.awt.Container.getPreferredSize(Container.java:1543)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1617)
        at
javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:769)
        at java.awt.Container.layout(Container.java:1401)
        at java.awt.Container.doLayout(Container.java:1390)
        at java.awt.Container.validateTree(Container.java:1473)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validateTree(Container.java:1480)
        at java.awt.Container.validate(Container.java:1448)
        at
javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:379)
        at
javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:113)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
[catch] at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:153)
        at java.awt.Dialog$1.run(Dialog.java:515)
        at java.awt.Dialog.show(Dialog.java:536)
        at
org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:800)
        at
org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:843)
        at
org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:831)
        at org.openide.util.Mutex.doEventAccess(Mutex.java:1146)
        at org.openide.util.Mutex.readAccess(Mutex.java:183)
        at
org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:816)
        at org.netbeans.core.ExitDialog.innerShowDialog(ExitDialog.java:241)
        at org.netbeans.core.ExitDialog.showDialog(ExitDialog.java:188)
        at org.netbeans.core.NbTopManager.doExit(NbTopManager.java:349)
        at org.netbeans.core.NbTopManager.exit(NbTopManager.java:325)
        at
org.netbeans.core.NbTopManager$NbLifecycleManager.exit(NbTopManager.java:424)
        at
org.netbeans.core.windows.view.ui.MainWindow$3.windowClosing(MainWindow.java:290)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at
java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:291)
        at java.awt.Window.processWindowEvent(Window.java:1190)
        at javax.swing.JFrame.processWindowEvent(JFrame.java:266)
        at java.awt.Window.processEvent(Window.java:1148)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        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)