java.lang.NullPointerException
        at org.netbeans.core.startup.ModuleList$Listener.stepDisable(ModuleList.java:1684)
        at org.netbeans.core.startup.ModuleList$Listener.access$2300(ModuleList.java:1307)
        at org.netbeans.core.startup.ModuleList$Listener$1.run(ModuleList.java:1538)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:509)
        at org.netbeans.core.startup.ModuleList$Listener.run(ModuleList.java:1513)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)