java.lang.IllegalStateException: The data object C:\Home\nm\Devel\pencom\PenCom\PenCom.war\build is invalid; you may not call getNodeDelegate on it any more; see #17020 and please fix your code
        at org.openide.loaders.DataObject.getNodeDelegate(DataObject.java:270)
        at org.openide.loaders.DataFolder.getClonedNodeDelegate(DataFolder.java:424)
        at org.openide.loaders.FolderChildren.createNodes(FolderChildren.java:205)
        at org.openide.loaders.FolderChildren.createNodes(FolderChildren.java:66)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1609)
        at org.openide.nodes.EntrySupport$Lazy$EntryInfo.getNode(EntrySupport.java:1552)
        at org.openide.nodes.EntrySupport$Lazy$EntryInfo.getNode(EntrySupport.java:1518)
        at org.openide.nodes.EntrySupport$Lazy.getNodes(EntrySupport.java:1173)
        at org.openide.nodes.Children.getNodes(Children.java:440)
        at org.openide.nodes.Children.findChild(Children.java:385)
        at org.openide.loaders.FolderChildren.findChild(FolderChildren.java:232)
        at org.openide.nodes.FilterNode$Children$LazySupport.findChild(FilterNode.java:1770)
        at org.openide.nodes.FilterNode$Children.findChild(FilterNode.java:1506)
        at org.openide.nodes.NodeOp.findChild(NodeOp.java:282)
        at org.openide.nodes.NodeOp.findPath(NodeOp.java:300)
        at org.netbeans.modules.project.ui.PhysicalView$PathFinder.findPath(PhysicalView.java:447)
        at org.netbeans.modules.project.ui.ProjectsRootNode.findNode(ProjectsRootNode.java:187)
        at org.netbeans.modules.project.ui.ProjectTab$2.run(ProjectTab.java:473)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)