org.xml.sax.SAXParseException: Document root element is missing.
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3182)
        at org.apache.crimson.parser.Parser2.fatal(Parser2.java:3170)
        at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:501)
        at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
        at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:442)
        at org.netbeans.core.windows.layers.WorkspaceData$PropertyHandler.readData(WorkspaceData.java:724)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.readProperties(WorkspaceData.java:379)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(WorkspaceData.java:332)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(WorkspaceData.java:673)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(WorkspaceImpl.java:894)
        at org.netbeans.core.windows.WorkspaceImpl.getDisplayName(WorkspaceImpl.java:222)
        at org.netbeans.core.windows.nodes.WorkspaceContext.<init>(WorkspaceContext.java:76)
        at org.netbeans.core.windows.nodes.WorkspaceContext.<init>(WorkspaceContext.java:68)
        at org.netbeans.core.windows.nodes.WorkspacePoolContext$Workspaces.createNodes(WorkspacePoolContext.java:241)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1820)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:125)
        at org.openide.nodes.Children$Info.nodes(Children.java:929)
        at org.openide.nodes.Children.updateAdd(Children.java:737)
        at org.openide.nodes.Children.setEntries(Children.java:526)
        at org.openide.nodes.Children$3.run(Children.java:1713)
        at org.openide.util.Mutex.postRequest(Mutex.java:865)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:368)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1721)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1703)
        at org.netbeans.core.windows.nodes.WorkspacePoolContext$Workspaces.propertyChange(WorkspacePoolContext.java:218)
        at org.openide.util.WeakListener$PropertyChange.propertyChange(WeakListener.java:325)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:255)
        at org.netbeans.core.windows.WindowManagerImpl.setWorkspaces(WindowManagerImpl.java:366)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateWorkspaces(WindowManagerData.java:361)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateAll(WindowManagerData.java:265)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.createInstance(WindowManagerData.java:250)
        at org.netbeans.core.windows.layers.ICFolderImpl$R.run(ICFolderImpl.java:261)
        at org.openide.util.Task.run(Task.java:152)
        at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)
java.io.IOException: Cannot parse configuration of workspace Workspace.
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.readProperties(WorkspaceData.java:387)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(WorkspaceData.java:332)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(WorkspaceData.java:673)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(WorkspaceImpl.java:894)
        at org.netbeans.core.windows.WorkspaceImpl.getDisplayName(WorkspaceImpl.java:222)
        at org.netbeans.core.windows.nodes.WorkspaceContext.<init>(WorkspaceContext.java:76)
        at org.netbeans.core.windows.nodes.WorkspaceContext.<init>(WorkspaceContext.java:68)
        at org.netbeans.core.windows.nodes.WorkspacePoolContext$Workspaces.createNodes(WorkspacePoolContext.java:241)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1820)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:125)
        at org.openide.nodes.Children$Info.nodes(Children.java:929)
        at org.openide.nodes.Children.updateAdd(Children.java:737)
        at org.openide.nodes.Children.setEntries(Children.java:526)
        at org.openide.nodes.Children$3.run(Children.java:1713)
        at org.openide.util.Mutex.postRequest(Mutex.java:865)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:368)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1721)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1703)
        at org.netbeans.core.windows.nodes.WorkspacePoolContext$Workspaces.propertyChange(WorkspacePoolContext.java:218)
        at org.openide.util.WeakListener$PropertyChange.propertyChange(WeakListener.java:325)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:255)
        at org.netbeans.core.windows.WindowManagerImpl.setWorkspaces(WindowManagerImpl.java:366)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateWorkspaces(WindowManagerData.java:361)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateAll(WindowManagerData.java:265)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.createInstance(WindowManagerData.java:250)
        at org.netbeans.core.windows.layers.ICFolderImpl$R.run(ICFolderImpl.java:261)
        at org.openide.util.Task.run(Task.java:152)
        at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:622)