java.lang.AssertionError: childName: P:\reciete4\RecieteLib\build\classes\UtilBib\SimpleList.class folderName: P:\reciete4\RecieteLib\build\classes\utilBib
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.addChild(ChildrenSupport.java:133)
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.rescanChild(ChildrenSupport.java:191)
   at org.netbeans.modules.masterfs.filebasedfs.children.ChildrenSupport.getChild(ChildrenSupport.java:106)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj$FolderChildrenCache.getChild(FolderObj.java:611)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getFileObject(FileObjectFactory.java:186)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.getValidFileObject(FileObjectFactory.java:697)
   at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.getFileObject(FileBasedFileSystem.java:137)
   at org.netbeans.modules.masterfs.filebasedfs.FileBasedURLMapper.getFileObjects(FileBasedURLMapper.java:134)
   at org.netbeans.modules.masterfs.MasterURLMapper.getFileObjects(MasterURLMapper.java:65)
   at org.openide.filesystems.URLMapper.findFileObject(URLMapper.java:216)
   at org.openide.filesystems.FileUtil.toFileObject(FileUtil.java:1023)
   at org.openide.filesystems.FileUtil$Holder.locateCurrent(FileUtil.java:412)
   at org.openide.filesystems.FileUtil$Holder.someChange(FileUtil.java:447)
   at org.openide.filesystems.FileUtil$Holder.fileFolderCreated(FileUtil.java:515)
   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:1139)
   at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:208)
   at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:182)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.refresh(FileObjectFactory.java:721)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.invokeRefreshFor(RootObj.java:197)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.invokeRefreshFor(RootObj.java:145)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.setAttribute(RootObj.java:138)
   at org.openide.filesystems.FileUtil.refreshFor(FileUtil.java:164)
   at org.openide.filesystems.FileUtil$1.run(FileUtil.java:187)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: childName: P:\reciete4\RecieteLib\build\classes\UtilBib\SimpleList.class folderName: P:\reciete4\RecieteLib\build\classes\utilBib
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1465)
   at org.openide.filesystems.FileUtil.refreshAll(FileUtil.java:202)
   at org.apache.tools.ant.module.bridge.impl.BridgeImpl$1.run(BridgeImpl.java:323)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)