java.lang.NullPointerException
   at org.netbeans.modules.masterfs.filebasedfs.naming.NameRef.getIndex(NameRef.java:64)
   at org.netbeans.modules.masterfs.filebasedfs.naming.NamingFactory.cleanQueue(NamingFactory.java:313)
   at org.netbeans.modules.masterfs.filebasedfs.naming.NamingFactory.registerInstanceOfFileNaming(NamingFactory.java:179)
   at org.netbeans.modules.masterfs.filebasedfs.naming.NamingFactory.registerInstanceOfFileNaming(NamingFactory.java:143)
   at org.netbeans.modules.masterfs.filebasedfs.naming.NamingFactory.fromFile(NamingFactory.java:80)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.create(FileObjectFactory.java:417)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getOrCreate(FileObjectFactory.java:400)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.issueIfExist(FileObjectFactory.java:372)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getFileObject(FileObjectFactory.java:195)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getValidFileObject(FileObjectFactory.java:697)
   at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.getFileObject(FileBasedFileSystem.java:137)
   at org.netbeans.modules.masterfs.filebasedfs.FileBasedURLMapper.getFileObjects(FileBasedURLMapper.java:134)
   at org.netbeans.modules.masterfs.MasterURLMapper.getFileObjects(MasterURLMapper.java:65)
   at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:216)
   at org.netbeans.core.startup.layers.NbinstURLMapper.decodeURL(NbinstURLMapper.java:113)
   at org.netbeans.core.startup.layers.NbinstURLMapper.getFileObjects(NbinstURLMapper.java:85)
   at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:216)
   at org.netbeans.core.startup.layers.ArchiveURLMapper.getFileObjects(ArchiveURLMapper.java:122)
   at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:216)
   at org.netbeans.modules.java.j2seplatform.libraries.J2SELibrarySourceForBinaryQuery.getNormalizedURL(J2SELibrarySourceForBinaryQuery.java:152)
   at org.netbeans.modules.java.j2seplatform.libraries.J2SELibrarySourceForBinaryQuery.preInit(J2SELibrarySourceForBinaryQuery.java:132)
   at org.netbeans.modules.java.j2seplatform.J2SEPlatformWarmUp.preInitJ2SELibsSFBQ(J2SEPlatformWarmUp.java:62)
   at org.netbeans.modules.java.j2seplatform.J2SEPlatformWarmUp.run(J2SEPlatformWarmUp.java:56)
   at org.netbeans.core.WarmUpSupport.run(WarmUpSupport.java:90)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)