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.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:186) at javax.swing.tree.FixedHeightLayoutCache$FHTreeStateNode.expand(FixedHeightLayoutCache.java:1152) at javax.swing.tree.FixedHeightLayoutCache.ensurePathIsExpanded(FixedHeightLayoutCache.java:662) at javax.swing.tree.FixedHeightLayoutCache.setExpandedState(FixedHeightLayoutCache.java:299) at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(BasicTreeUI.java:1695) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(BasicTreeUI.java:3785) at javax.swing.JTree.fireTreeExpanded(JTree.java:2756) at javax.swing.JTree.setExpandedState(JTree.java:3616) at javax.swing.JTree.expandPath(JTree.java:2204) at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:2266) at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(BasicTreeUI.java:2253) at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(BasicTreeUI.java:2211) at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3580) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(BasicTreeUI.java:3566) at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(BasicTreeUI.java:3525) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279) at java.awt.Component.processMouseEvent(Component.java:6502) at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) at java.awt.Component.processEvent(Component.java:6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4489) at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422) at java.awt.Container.dispatchEventImpl(Container.java:2273) at java.awt.Window.dispatchEventImpl(Window.java:2719) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:703) at java.awt.EventQueue.access$000(EventQueue.java:102) at java.awt.EventQueue$3.run(EventQueue.java:662) at java.awt.EventQueue$3.run(EventQueue.java:660) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:676) at java.awt.EventQueue$4.run(EventQueue.java:674) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:673) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139) at java.awt.EventDispatchThread.run(EventDispatchThread.java:97)