java.lang.NullPointerException
   at org.netbeans.modules.form.layoutdesign.LayoutPersistenceManager.saveLayout(LayoutPersistenceManager.java:158)
   at org.netbeans.modules.form.layoutdesign.LayoutPersistenceManager.saveContainer(LayoutPersistenceManager.java:138)
   at org.netbeans.modules.form.layoutdesign.LayoutModel.saveContainerLayout(LayoutModel.java:1217)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveLayout(GandalfPersistenceManager.java:3379)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3333)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3306)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3350)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3306)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveContainer(GandalfPersistenceManager.java:3350)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveAnyComponent(GandalfPersistenceManager.java:3306)
   at org.netbeans.modules.form.GandalfPersistenceManager.saveForm(GandalfPersistenceManager.java:3195)
   at org.netbeans.modules.form.FormEditor.saveFormData(FormEditor.java:413)
   at org.netbeans.modules.nbform.FormEditorSupport.saveDocument(FormEditorSupport.java:498)
   at org.netbeans.modules.nbform.FormEditorSupport$16.doSave(FormEditorSupport.java:1653)
   at org.netbeans.modules.nbform.FormEditorSupport$16.save(FormEditorSupport.java:1633)
   at org.openide.loaders.DataObject$DOSavable.handleSave(DataObject.java:1326)
   at org.netbeans.spi.actions.AbstractSavable.save(AbstractSavable.java:107)
   at org.netbeans.core.ExitDialog.save(ExitDialog.java:188)
   at org.netbeans.core.ExitDialog.save(ExitDialog.java:167)
   at org.netbeans.core.ExitDialog.actionPerformed(ExitDialog.java:146)
   at org.netbeans.core.windows.services.NbPresenter$ButtonListener.actionPerformed(NbPresenter.java:1369)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
   at java.awt.Component.processMouseEvent(Component.java:6505)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6270)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:696)
   at java.awt.EventQueue$4.run(EventQueue.java:694)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:154)
   at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
   at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
   at java.awt.Dialog.show(Dialog.java:1077)
   at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:1074)
   at org.netbeans.core.windows.services.NbPresenter.doShow(NbPresenter.java:1114)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:1096)
   at org.netbeans.core.windows.services.NbPresenter.run(NbPresenter.java:126)
   at org.openide.util.Mutex.doEventAccess(Mutex.java:1363)
   at org.openide.util.Mutex.readAccess(Mutex.java:273)
   at org.netbeans.core.windows.services.NbPresenter.show(NbPresenter.java:1081)
   at java.awt.Component.show(Component.java:1651)
   at java.awt.Component.setVisible(Component.java:1603)
   at java.awt.Window.setVisible(Window.java:1014)
   at java.awt.Dialog.setVisible(Dialog.java:1003)
   at org.netbeans.core.ExitDialog.innerShowDialog(ExitDialog.java:276)
   at org.netbeans.core.ExitDialog.showDialog(ExitDialog.java:222)
   at org.netbeans.core.NbLifecycleManager.doExit(NbLifecycleManager.java:178)
   at org.netbeans.core.NbLifecycleManager.access$000(NbLifecycleManager.java:75)
   at org.netbeans.core.NbLifecycleManager$ExitActions.run(NbLifecycleManager.java:135)
   at org.openide.util.Mutex.doEvent(Mutex.java:1343)
   at org.openide.util.Mutex.readAccess(Mutex.java:350)
   at org.netbeans.core.NbLifecycleManager.exit(NbLifecycleManager.java:111)
   at org.netbeans.core.windows.view.ui.MainWindow$6.windowClosing(MainWindow.java:479)
   at java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:349)
   at java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:349)
   at java.awt.AWTEventMulticaster.windowClosing(AWTEventMulticaster.java:349)
   at java.awt.Window.processWindowEvent(Window.java:2051)
   at javax.swing.JFrame.processWindowEvent(JFrame.java:296)
   at java.awt.Window.processEvent(Window.java:2009)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:682)
   at java.awt.EventQueue$3.run(EventQueue.java:680)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:696)
   at java.awt.EventQueue$4.run(EventQueue.java:694)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)