java.lang.AssertionError: Should be a folder: C:\Users\Mark\Documents\NetBeansProjects\Internationalization\build\classes@5e0310e5:39f1a8 data: true
   at org.netbeans.modules.masterfs.watcher.Watcher$Ext.register(Watcher.java:224)
   at org.netbeans.modules.masterfs.watcher.Watcher.register(Watcher.java:116)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj.addFileChangeListener(BaseFileObj.java:510)
   at org.netbeans.modules.java.source.usages.fcs.FileChangeSupport$Holder.locateCurrent(FileChangeSupport.java:165)
   at org.netbeans.modules.java.source.usages.fcs.FileChangeSupport$Holder.someChange(FileChangeSupport.java:184)
   at org.netbeans.modules.java.source.usages.fcs.FileChangeSupport$Holder.fileFolderCreated(FileChangeSupport.java:217)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:142)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:128)
   at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105)
   at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1242)
   at org.openide.filesystems.FileSystem$EventDispatcher.run(FileSystem.java:997)
   at org.openide.filesystems.EventControl.dispatchEvent(EventControl.java:84)
   at org.openide.filesystems.FileSystem.dispatchEvent(FileSystem.java:642)
   at org.openide.filesystems.FileObject.dispatchEvent(FileObject.java:564)
   at org.openide.filesystems.FileObject.fireFileFolderCreatedEvent(FileObject.java:524)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj.fireFileFolderCreatedEvent(BaseFileObj.java:645)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.refreshImpl(FolderObj.java:491)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj.refresh(BaseFileObj.java:816)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.refresh(FolderObj.java:553)
   at org.openide.filesystems.FileObject.refresh(FileObject.java:1130)
   at org.netbeans.modules.masterfs.watcher.Watcher$1.run(Watcher.java:373)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Should be a folder: C:\Users\Mark\Documents\NetBeansProjects\Internationalization\build\classes@5e0310e5:39f1a8 data: true
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1452)
   at org.netbeans.modules.masterfs.watcher.Watcher.enqueue(Watcher.java:386)
   at org.netbeans.modules.masterfs.watcher.Watcher.access$200(Watcher.java:74)
   at org.netbeans.modules.masterfs.watcher.Watcher$Ext.run(Watcher.java:323)
   at java.lang.Thread.run(Thread.java:722)