java.lang.NullPointerException
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.getFileObject(FolderObj.java:126)
   at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.loadProject(AntBasedProjectFactorySingleton.java:229)
   at org.netbeans.api.project.ProjectManager.createProject(ProjectManager.java:365)
   at org.netbeans.api.project.ProjectManager.access$300(ProjectManager.java:85)
   at org.netbeans.api.project.ProjectManager$2.run(ProjectManager.java:286)
   at org.netbeans.api.project.ProjectManager$2.run(ProjectManager.java:233)
   at org.openide.util.Mutex.readAccess(Mutex.java:332)
   at org.netbeans.api.project.ProjectManager.findProject(ProjectManager.java:233)
   at org.netbeans.modules.projectapi.SimpleFileOwnerQueryImplementation.getOwner(SimpleFileOwnerQueryImplementation.java:127)
   at org.netbeans.api.project.FileOwnerQuery.getOwner(FileOwnerQuery.java:104)
   at org.netbeans.modules.refactoring.java.RefactoringUtils.isOnSourceClasspath(RefactoringUtils.java:288)
   at org.netbeans.modules.refactoring.java.api.JavaRefactoringUtils.isOnSourceClasspath(JavaRefactoringUtils.java:102)
   at org.netbeans.modules.refactoring.java.ui.RefactoringActionsProvider.canCopy(RefactoringActionsProvider.java:190)
   at org.netbeans.modules.refactoring.api.impl.ActionsImplementationFactory.canCopy(ActionsImplementationFactory.java:190)
   at org.netbeans.modules.refactoring.impl.ClipboardConvertor.convert(ClipboardConvertor.java:101)
   at org.openide.util.datatransfer.ExClipboard.convert(ExClipboard.java:136)
   at org.openide.loaders.DataFolder$FolderNode.createNodeTransferable(DataFolder.java:1433)
   at org.openide.loaders.DataFolder$FolderNode.createPasteTypes(DataFolder.java:1402)
   at org.openide.nodes.AbstractNode.getPasteTypes(AbstractNode.java:543)
   at org.openide.nodes.FilterNode.getPasteTypes(FilterNode.java:696)
   at org.openide.nodes.FilterNode.getPasteTypes(FilterNode.java:696)
   at org.openide.nodes.FilterNode.getPasteTypes(FilterNode.java:696)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updatePasteTypes(ExplorerActionsImpl.java:355)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updatePasteAction(ExplorerActionsImpl.java:341)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl.updateActions(ExplorerActionsImpl.java:282)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.run(ExplorerActionsImpl.java:769)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:1493)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.schedule(ExplorerActionsImpl.java:801)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$ActionStateUpdater.flavorsChanged(ExplorerActionsImpl.java:760)
   at sun.reflect.GeneratedMethodAccessor116.invoke(GeneratedMethodAccessor116.java:0)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:457)
   at $Proxy16.flavorsChanged(.java:0)
   at org.netbeans.NbClipboard.fireChange(NbClipboard.java:378)
   at org.netbeans.NbClipboard.run(NbClipboard.java:321)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)