Annotation: Could not work with top component reference Windows/WindowManager/Editing/MDR Explorer/MDR Explorer_68.wstcref and update its mode, reason: Could not restore Explorer window; the root node "MDRManager" is not persistent.
Annotation: Cannot read class: org.netbeans.modules.mdrexplorer.actions.MDRExplorer
Annotation: Source: Windows/Components/MDR Explorer_68.settings
Annotation: Content: 
<?xml version="1.0"?>
<!DOCTYPE settings PUBLIC "-//NetBeans//DTD Session settings 1.0//EN" "http://www.netbeans.org/dtds/sessionsettings-1_0.dtd">
<settings version="1.0">
    <module name="org.netbeans.modules.mdrexplorer/1" spec="0.31"/>
    <instanceof class="java.lang.Object"/>
    <instanceof class="java.awt.Component"/>
    <instanceof class="java.io.Externalizable"/>
    <instanceof class="org.openide.windows.TopComponent"/>
    <instanceof class="javax.swing.JComponent"/>
    <instanceof class="java.io.Serializable"/>
    <instanceof class="java.awt.image.ImageObserver"/>
    <instanceof class="org.netbeans.modules.mdrexplorer.actions.MDRExplorer"/>
    <instanceof class="java.awt.Container"/>
    <instanceof class="javax.accessibility.Accessible"/>
    <instanceof class="org.openide.explorer.ExplorerPanel"/>
    <instanceof class="org.openide.explorer.ExplorerManager$Provider"/>
    <instanceof class="java.awt.MenuContainer"/>
    <serialdata class="org.netbeans.modules.mdrexplorer.actions.MDRExplorer">
        ACED0005737200296F72672E6F70656E6964652E77696E646F77732E546F70436F6D706F6E656E74245265706C6163657284
        874494BDDF6D6403000078707400346F72672E6E65746265616E732E6D6F64756C65732E6D64726578706C6F7265722E6163
        74696F6E732E4D44524578706C6F7265727372000F6A6176612E6C616E672E53686F7274684D37133460DA52020001530005
        76616C7565787200106A6176612E6C616E672E4E756D62657286AC951D0B94E08B0200007870000177040000000174001545
        78706C6F726572205B4D44524D616E616765725D7070737200266F72672E6F70656E6964652E7574696C2E696F2E4E624D61
        727368616C6C65644F626A6563746CD5CC1AA397C0F2020002490004686173685B00086F626A42797465737400025B427870
        B4424604757200025B42ACF317F8060854E00200007870000000DAACED0005737200246F72672E6F70656E6964652E657870
        6C6F7265722E4578706C6F7265724D616E61676572C3E7932E42491E100300045B00086578706C6F7265647400135B4C6A61
        76612F6C616E672F537472696E673B4C0004726F6F7474001F4C6F72672F6F70656E6964652F6E6F6465732F4E6F64652448
        616E646C653B4C0008726F6F744E616D657400124C6A6176612F6C616E672F537472696E673B5B000873656C656374656474
        00135B4C6A6176612F6C616E672F4F626A6563743B787071007E0005707074000A4D44524D616E61676572707878
    </serialdata>
</settings>
java.io.IOException: Could not restore Explorer window; the root node "MDRManager" is not persistent.
        at org.openide.windows.TopComponent$Replacer.readObject(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.readSerial(Unknown Source)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.instanceCreate(Unknown Source)
        at org.netbeans.core.projects.SerialDataConvertor$SettingsInstance.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.PersistenceManager.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.getTopComponent(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.updateMode(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.addComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateProperties(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.createInstance(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl$R.run(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.createModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl$2.run(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.setCurrentWorkspace(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.activate(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateWorkspaces(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.getCurrentWorkspace(Unknown Source)
[catch] at org.netbeans.core.windows.MainWindow$5.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
==>
java.io.IOException: Could not restore Explorer window; the root node "MDRManager" is not persistent.
        at org.openide.explorer.ExplorerManager.readObject(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.openide.util.io.NbMarshalledObject.get(Unknown Source)
        at org.openide.explorer.ExplorerPanel.readExternal(Unknown Source)
        at org.openide.windows.TopComponent$Replacer.readObject(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.readSerial(Unknown Source)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.instanceCreate(Unknown Source)
        at org.netbeans.core.projects.SerialDataConvertor$SettingsInstance.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.PersistenceManager.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.getTopComponent(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.updateMode(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.addComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateProperties(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.createInstance(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl$R.run(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.createModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl$2.run(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.setCurrentWorkspace(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.activate(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateWorkspaces(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.getCurrentWorkspace(Unknown Source)
[catch] at org.netbeans.core.windows.MainWindow$5.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
==>
java.io.IOException: Could not restore Explorer window; the root node "MDRManager" is not persistent.
        at org.openide.explorer.ExplorerManager.readObject(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.openide.util.io.NbMarshalledObject.get(Unknown Source)
        at org.openide.explorer.ExplorerPanel.readExternal(Unknown Source)
        at org.openide.windows.TopComponent$Replacer.readObject(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:824)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.readSerial(Unknown Source)
        at org.netbeans.core.projects.XMLSettingsSupport$SettingsRecognizer.instanceCreate(Unknown Source)
        at org.netbeans.core.projects.SerialDataConvertor$SettingsInstance.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.PersistenceManager.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.lookupTCInstance(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.getTopComponent(Unknown Source)
        at org.netbeans.core.windows.layers.TCRefImpl.updateMode(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.addComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateComponents(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateProperties(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.ModeData$CookiesImpl.createInstance(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl$R.run(Unknown Source)
        at org.netbeans.core.windows.layers.ICFolderImpl.instanceCreate(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.createModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateModes(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WorkspaceData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl$2.run(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.setCurrentWorkspace(Unknown Source)
        at org.netbeans.core.windows.WorkspaceImpl.activate(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateWorkspaces(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.updateAll(Unknown Source)
        at org.netbeans.core.windows.layers.WindowManagerData$InstanceCookieImpl.loadDataSection(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.ensureSectionLoaded(Unknown Source)
        at org.netbeans.core.windows.WindowManagerImpl.getCurrentWorkspace(Unknown Source)
[catch] at org.netbeans.core.windows.MainWindow$5.run(Unknown Source)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)