java.lang.IllegalStateException: Somebody changed internal state meanwhile! Expected: Inited: false Thread: Thread[GUI Builder,1,system] InProgress: true MustNotify: false Entries: 11; vis. entries: 11; Infos: 11; entriesSize: 11; entryToInfoSize: 11 1 entry Children.Keys.KE[MultiFileObject@685210de[FormDesignerPalette/_Layouts_only_for_internal_use_],0],0] -> EntryInfo for entry: Children.Keys.KE[MultiFileObject@685210de[FormDesignerPalette/_Layouts_only_for_internal_use_],0],0], node: null 2 entry Children.Keys.KE[erChildren.Pair[MultiFileObject@1cd5b765[FormDesignerPalette/SwingContainers],0],0] -> EntryInfo for entry: Children.Keys.KE[erChildren.Pair[MultiFileObject@1cd5b765[FormDesignerPalette/SwingContainers],0],0], node: null 3 entry Children.Keys.KE[lderChildren.Pair[MultiFileObject@12fb56ad[FormDesignerPalette/SwingControls],0],0] -> EntryInfo for entry: Children.Keys.KE[lderChildren.Pair[MultiFileObject@12fb56ad[FormDesignerPalette/SwingControls],0],0], node: null 4 entry Children.Keys.KE[FolderChil at org.openide.nodes.EntrySupportLazy.setState(EntrySupportLazy.java:87) at org.openide.nodes.EntrySupportLazy.setEntriesSimple(EntrySupportLazy.java:681) at org.openide.nodes.EntrySupportLazy.setEntries(EntrySupportLazy.java:458) 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: false Thread: Thread[GUI Builder,1,system] InProgress: true MustNotify: false Entries: 11; vis. entries: 11; Infos: 11; entriesSize: 11; entryToInfoSize: 11 1 entry Children.Keys.KE[MultiFileObject@685210de[FormDesignerPalette/_Layouts_only_for_internal_use_],0],0] -> EntryInfo for entry: Children.Keys.KE[MultiFileObject@685210de[FormDesignerPalette/_Layouts_only_for_internal_use_],0],0], node: null 2 entry Children.Keys.KE[erChildren.Pair[MultiFileObject@1cd5b765[FormDesignerPalette/SwingContainers],0],0] -> EntryInfo for entry: Children.Keys.KE[erChildren.Pair[MultiFileObject@1cd5b765[FormDesignerPalette/SwingContainers],0],0], node: null 3 entry Children.Keys.KE[lderChildren.Pair[MultiFileObject@12fb56ad[FormDesignerPalette/SwingControls],0],0] -> EntryInfo for entry: Children.Keys.KE[lderChildren.Pair[MultiFileObject@12fb56ad[FormDesignerPalette/Swin 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.getNodes(FolderChildren.java:262) at org.openide.nodes.FilterNode$Children$LazySupport.callGetNodes(FilterNode.java:1767) at org.openide.nodes.FilterNode$Children.getNodes(FilterNode.java:1606) at org.netbeans.modules.palette.DefaultModel.getCategories(DefaultModel.java:154) at org.netbeans.modules.palette.DefaultSettings.(DefaultSettings.java:106) at org.netbeans.spi.palette.PaletteFactory.createPalette(PaletteFactory.java:165) at org.netbeans.spi.palette.PaletteFactory.createPalette(PaletteFactory.java:115) at org.netbeans.modules.form.palette.PaletteUtils.createPalette(PaletteUtils.java:309) at org.netbeans.modules.form.palette.PaletteUtils.access$100(PaletteUtils.java:80) at org.netbeans.modules.form.palette.PaletteUtils$1.run(PaletteUtils.java:238) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)