java.lang.AssertionError: Path should be absolute: StringRef{\\VBOXSVR}
   at org.clang.tools.services.impl.PreprocessorInitializer.clearFileCache(PreprocessorInitializer.java:160)
   at org.clang.tools.services.ClankPreprocessorServices.invalidate(ClankPreprocessorServices.java:75)
   at org.netbeans.modules.cnd.apt.impl.support.clank.ClankDriverImpl.invalidateImpl(ClankDriverImpl.java:89)
   at org.netbeans.modules.cnd.apt.impl.support.clank.FileExistsSensitiveClankCacheDriver.invalidateFile(FileExistsSensitiveClankCacheDriver.java:67)
   at org.netbeans.modules.cnd.utils.cache.CndFileUtils$FSListener.invalidateFile(CndFileUtils.java:894)
   at org.netbeans.modules.cnd.utils.cache.CndFileUtils$FSListener.cleanCachesImpl(CndFileUtils.java:906)
   at org.netbeans.modules.cnd.utils.cache.CndFileUtils$FSListener.clearCachesAboutFile(CndFileUtils.java:857)
   at org.netbeans.modules.cnd.utils.cache.CndFileUtils$FSListener.clearCachesAboutFile(CndFileUtils.java:853)
   at org.netbeans.modules.cnd.utils.cache.CndFileUtils$FSListener.fileDeleted(CndFileUtils.java:828)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:181)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapperMulti.dispatchAllEventsSync(FCLSupport.java:248)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:137)
   at org.openide.filesystems.FCLSupport$1.run(FCLSupport.java:261)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.AssertionError: Path should be absolute: StringRef{\\VBOXSVR}