java.lang.IllegalStateException: Somebody changed internal state meanwhile! Expected: Inited: true Thread: Thread[AWT-EventQueue-1,6,IDE Main] InProgress: true MustNotify: false Entries: 0; vis. entries: 0; Infos: 0; entriesSize: 0; entryToInfoSize: 0 current : Inited: true Thread: null InProgress: true MustNotify: false Entries: 0; vis. entries: 0; Infos: 0; entriesSize: 0; entryToInfoSize: 0 at org.openide.nodes.EntrySupportLazy.setState(EntrySupportLazy.java:87) at org.openide.nodes.EntrySupportLazy.setEntries(EntrySupportLazy.java:499) at org.openide.nodes.EntrySupport.setEntries(EntrySupport.java:83) at org.openide.nodes.Children$Keys$2.run(Children.java:1556) at org.openide.util.Mutex$1Exec.run(Mutex.java:1246) at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1921) at org.openide.util.Mutex.postRequest(Mutex.java:1252) at org.openide.util.Mutex.postRequest(Mutex.java:1215) at org.openide.util.Mutex.postWriteRequest(Mutex.java:587) at org.openide.nodes.Children$Keys.applyKeys(Children.java:1565) at org.openide.nodes.Children$Keys.setKeys(Children.java:1509) at org.openide.loaders.FolderChildren.access$600(FolderChildren.java:73) at org.openide.loaders.FolderChildren$1R.run(FolderChildren.java:188) Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalStateException: Somebody changed internal state meanwhile! Expected: Inited: true Thread: Thread[AWT-EventQueue-1,6,IDE Main] InProgress: true MustNotify: false Entries: 0; vis. entries: 0; Infos: 0; entriesSize: 0; entryToInfoSize: 0 current : Inited: true Thread: null InProgress: true MustNotify: false Entries: 0; vis. entries: 0; Infos: 0; entriesSize: 0; entryToInfoSize: 0 at org.openide.util.RequestProcessor.post(RequestProcessor.java:424) at org.openide.loaders.FolderChildren.refreshChildren(FolderChildren.java:205) at org.openide.loaders.FolderChildren.waitOptimalResult(FolderChildren.java:293) at org.openide.loaders.FolderChildren.getNodesCount(FolderChildren.java:307) at org.openide.nodes.FilterNode$Children$LazySupport.callGetNodesCount(FilterNode.java:1775) at org.openide.nodes.FilterNode$Children.getNodesCount(FilterNode.java:1611) at org.openide.nodes.FilterNode$Children$LazySupport.callGetNodesCount(FilterNode.java:1775) at org.openide.nodes.FilterNode$Children.getNodesCount(FilterNode.java:1611) at org.openide.explorer.view.TreeView$6.run(TreeView.java:988) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)