java.lang.IllegalStateException: The data object MasterFileObject@1e2e35a[C:/Documents and Settings/mr97946/My Documents/NetBeansProjects/MobileApplication13/src/test/VisualMIDlet.java] is invalid; you may not call getNodeDelegate on it any more; see #17020 and please fix your code
    at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:239)
    at org.netbeans.modules.project.ui.ProjectUtilities$3.run(ProjectUtilities.java:247)
    at org.openide.util.Mutex.doEvent(Mutex.java:1181)
    at org.openide.util.Mutex.writeAccess(Mutex.java:376)
    at org.netbeans.modules.project.ui.ProjectUtilities.openAndSelectNewObject(ProjectUtilities.java:245)
    at org.netbeans.modules.project.ui.actions.NewFile.doPerform(NewFile.java:150)
    at org.netbeans.modules.project.ui.actions.NewFile.access$200(NewFile.java:58)
    at org.netbeans.modules.project.ui.actions.NewFile$PopupListener.actionPerformed(NewFile.java:319)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
    at java.awt.Component.processMouseEvent(Component.java:5488)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
    at java.awt.Component.processEvent(Component.java:5253)
    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:3892)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
    at java.awt.Container.dispatchEventImpl(Container.java:2010)
    at java.awt.Window.dispatchEventImpl(Window.java:1778)
    at java.awt.Component.dispatchEvent(Component.java:3803)
[catch] 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)