java.lang.NullPointerException
        at org.netbeans.core.windows.persistence.ModeParser.addTCRef(ModeParser.java:725)
        at org.netbeans.core.windows.persistence.WindowManagerParser.addTCRef(WindowManagerParser.java:267)
        at org.netbeans.core.windows.persistence.ModuleChangeHandler.addTCRef(ModuleChangeHandler.java:347)
        at org.netbeans.core.windows.persistence.ModuleChangeHandler.processTCRef(ModuleChangeHandler.java:333)
        at org.netbeans.core.windows.persistence.ModuleChangeHandler.processDataOrFolderCreated(ModuleChangeHandler.java:235)
        at org.netbeans.core.windows.persistence.ModuleChangeHandler.fileDataCreated(ModuleChangeHandler.java:187)
        at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:97)
        at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:938)
        at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:203)
        at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:177)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:122)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499)
        at org.netbeans.core.startup.layers.ModuleLayeredFileSystem.setURLs(ModuleLayeredFileSystem.java:301)
        at org.netbeans.core.startup.layers.ModuleLayeredFileSystem.addURLs(ModuleLayeredFileSystem.java:374)
        at org.netbeans.core.startup.NbInstaller.loadLayers(NbInstaller.java:557)
        at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:262)
        at org.netbeans.ModuleManager.enable(ModuleManager.java:933)
        at org.netbeans.modules.autoupdate.services.OperationSupportImpl$ForEnable.enable(OperationSupportImpl.java:157)
        at org.netbeans.modules.autoupdate.services.OperationSupportImpl$ForEnable.doOperation(OperationSupportImpl.java:140)
        at org.netbeans.api.autoupdate.OperationSupport.doOperation(OperationSupport.java:67)
        at org.netbeans.modules.autoupdate.ui.wizards.UninstallStep.handleAction(UninstallStep.java:199)
        at org.netbeans.modules.autoupdate.ui.wizards.UninstallStep.doAction(UninstallStep.java:159)
        at org.netbeans.modules.autoupdate.ui.wizards.UninstallStep.access$000(UninstallStep.java:74)
        at org.netbeans.modules.autoupdate.ui.wizards.UninstallStep$1.propertyChange(UninstallStep.java:133)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at java.awt.Component.firePropertyChange(Component.java:7865)
        at org.netbeans.modules.autoupdate.ui.wizards.OperationPanel.access$000(OperationPanel.java:61)
        at org.netbeans.modules.autoupdate.ui.wizards.OperationPanel$1.run(OperationPanel.java:76)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)