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$1R.run(FolderChildren.java:188) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032) Caused: org.openide.util.RequestProcessor$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.addNotify(FolderChildren.java:335) at org.openide.nodes.Children.callAddNotify(Children.java:575) at org.openide.nodes.EntrySupportLazy.checkInit(EntrySupportLazy.java:116) at org.openide.nodes.EntrySupportLazy.getNodesCount(EntrySupportLazy.java:339) at org.openide.nodes.FilterNode$Children$LazySupport.update(FilterNode.java:1811) at org.openide.nodes.FilterNode$Children.addNotifyImpl(FilterNode.java:1476) at org.openide.nodes.FilterNode$Children.addNotify(FilterNode.java:1469) at org.openide.nodes.Children.callAddNotify(Children.java:575) at org.openide.nodes.EntrySupportLazy.checkInit(EntrySupportLazy.java:116) at org.openide.nodes.EntrySupportLazy.getNodesCount(EntrySupportLazy.java:339) at org.openide.nodes.Children.getNodesCount(Children.java:509) at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:258) at org.openide.explorer.view.VisualizerNode.getChildren(VisualizerNode.java:248) at org.openide.explorer.view.VisualizerNode.getChildCount(VisualizerNode.java:325) at javax.swing.tree.DefaultTreeModel.getChildCount(DefaultTreeModel.java:168) at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1135) at javax.swing.tree.FixedHeightLayoutCache.ensurePathIsExpanded(FixedHeightLayoutCache.java:645) at javax.swing.tree.FixedHeightLayoutCache.setExpandedState(FixedHeightLayoutCache.java:282) at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1643) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3716) at javax.swing.JTree.fireTreeExpanded(JTree.java:2656) at javax.swing.JTree.setExpandedState(JTree.java:3427) at javax.swing.JTree.expandPath(JTree.java:2163) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2204) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2191) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2149) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3511) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3497) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3456) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:262) at java.awt.Component.processMouseEvent(Component.java:6287) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6055) at java.awt.Container.processEvent(Container.java:2039) at java.awt.Component.dispatchEventImpl(Component.java:4653) at java.awt.Container.dispatchEventImpl(Container.java:2097) at java.awt.Component.dispatchEvent(Component.java:4481) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4575) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4233) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4166) at java.awt.Container.dispatchEventImpl(Container.java:2083) at java.awt.Window.dispatchEventImpl(Window.java:2482) at java.awt.Component.dispatchEvent(Component.java:4481) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648) at java.awt.EventQueue.access$000(EventQueue.java:84) at java.awt.EventQueue$1.run(EventQueue.java:607) at java.awt.EventQueue$1.run(EventQueue.java:605) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) at java.awt.EventQueue$2.run(EventQueue.java:621) at java.awt.EventQueue$2.run(EventQueue.java:619) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:618) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)