java.lang.IllegalStateException: Somebody changed internal state meanwhile!
Expected: Inited: false
Thread: Thread[org.netbeans.modules.project.ui.ProjectTab,1,system]
InProgress: true
MustNotify: false
Entries: 1; vis. entries: 1; Infos: 1; entriesSize: 1; entryToInfoSize: 1
1 entry Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0] -> EntryInfo for entry: Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0], node: null


 contained EntryInfo for entry: Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0], node: null
current : Inited: true
Thread: null
InProgress: true
MustNotify: false
Entries: 1; vis. entries: 1; Infos: 1; entriesSize: 1; entryToInfoSize: 1
1 entry Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0] -> EntryInfo for entry: Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java
   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[org.netbeans.modules.project.ui.ProjectTab,1,system]
InProgress: true
MustNotify: false
Entries: 1; vis. entries: 1; Infos: 1; entriesSize: 1; entryToInfoSize: 1
1 entry Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0] -> EntryInfo for entry: Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0], node: null


 contained EntryInfo for entry: Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0], node: null
current : Inited: true
Thread: null
InProgress: true
MustNotify: false
Entries: 1; vis. entries: 1; Infos: 1; entriesSize: 1; entryToInfoSize: 1
1 entry Children.Keys.KE[aApplication19\src\javaapplication19\JavaApplication19.java@2b82742b:11754758,0],0] -> EntryInfo for entry: Children.Key
   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.Children.getNodesCount(Children.java:509)
   at org.openide.loaders.FolderChildren.getNodesCount(FolderChildren.java:309)
   at org.openide.loaders.FolderChildren.findChild(FolderChildren.java:284)
   at org.openide.nodes.FilterNode$Children$LazySupport.findChild(FilterNode.java:1779)
   at org.openide.nodes.FilterNode$Children.findChild(FilterNode.java:1509)
   at org.openide.nodes.NodeOp.findChild(NodeOp.java:274)
   at org.openide.nodes.NodeOp.findPath(NodeOp.java:292)
   at org.openide.nodes.NodeOp.findPath(NodeOp.java:322)
   at org.netbeans.modules.project.ui.ProjectTab$KeepExpansion.run(ProjectTab.java:445)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)