java.lang.NullPointerException
   at org.openide.text.DataEditorSupport$Env$1Mark.<init>(DataEditorSupport.java:956)
   at org.openide.text.DataEditorSupport$Env.markModified(DataEditorSupport.java:971)
   at org.openide.text.CloneableEditorSupport.notifyModified(CloneableEditorSupport.java:1572)
   at org.netbeans.modules.mobility.editor.pub.J2MEDataObject$J2MEEditorSupport.notifyModified(J2MEDataObject.java:442)
   at org.netbeans.modules.vmd.io.javame.MEDesignEditorSupport.notifyModified(MEDesignEditorSupport.java:143)
   at org.netbeans.modules.vmd.io.javame.MEDesignDataObject.notifyEditorSupportModified(MEDesignDataObject.java:124)
   at org.netbeans.modules.vmd.io.DataObjectContextImpl.notifyModified(DataObjectContextImpl.java:124)
   at org.netbeans.modules.vmd.io.DocumentInterfaceImpl.notifyModified(DocumentInterfaceImpl.java:77)
   at org.netbeans.modules.vmd.api.model.TransactionManager.writeAccessRootEnd(TransactionManager.java:158)
   at org.netbeans.modules.vmd.api.model.TransactionManager.writeAccessCore(TransactionManager.java:126)
   at org.netbeans.modules.vmd.api.model.TransactionManager.access$100(TransactionManager.java:63)
   at org.netbeans.modules.vmd.api.model.TransactionManager$2$1.run(TransactionManager.java:106)
   at org.openide.util.Mutex.writeAccess(Mutex.java:479)
   at org.netbeans.modules.vmd.api.model.TransactionManager$2.run(TransactionManager.java:104)
   at org.openide.util.Mutex.readAccess(Mutex.java:372)
   at org.netbeans.modules.vmd.api.model.DescriptorRegistry$2.run(DescriptorRegistry.java:124)
   at org.openide.util.Mutex.readAccess(Mutex.java:372)
   at org.netbeans.modules.vmd.api.model.GlobalDescriptorRegistry.readAccess(GlobalDescriptorRegistry.java:163)
   at org.netbeans.modules.vmd.api.model.DescriptorRegistry.readAccess(DescriptorRegistry.java:122)
   at org.netbeans.modules.vmd.api.model.TransactionManager.writeAccess(TransactionManager.java:102)
   at org.netbeans.modules.vmd.midp.screen.display.property.ScreenStringPropertyEditor$StringTextField.keyTyped(ScreenStringPropertyEditor.java:125)
   at java.awt.Component.processKeyEvent(Component.java:6471)
   at javax.swing.JComponent.processKeyEvent(JComponent.java:2828)
   at java.awt.Component.processEvent(Component.java:6293)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4872)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4698)
   at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1887)
   at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
   at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
   at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
   at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
   at java.awt.Component.dispatchEventImpl(Component.java:4742)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Window.dispatchEventImpl(Window.java:2719)
   at java.awt.Component.dispatchEvent(Component.java:4698)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   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:708)
   at java.awt.EventQueue$4.run(EventQueue.java:706)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   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)