java.lang.NullPointerException

	at org.netbeans.mdr.util.IOUtils.readMOFID(IOUtils.java:364)

	at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:479)

	at org.netbeans.mdr.util.IOUtils.read(IOUtils.java:273)

	at org.netbeans.mdr.storagemodel.StorableObject.read(StorableObject.java:385)

	at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.readStreamable(BtreeDatabase.java:906)

	at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getRecord(BtreeDatabase.java:974)

	at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getIfExists(BtreeDatabase.java:719)

	at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.getIfExists(BtreeDatabase.java:699)

	at org.netbeans.mdr.persistence.btreeimpl.btreestorage.BtreeDatabase.get(BtreeDatabase.java:734)

	at org.netbeans.mdr.storagemodel.MdrStorage.getObject(MdrStorage.java:621)

	at org.netbeans.mdr.handlers.BaseObjectHandler._getDelegate(BaseObjectHandler.java:451)

	at org.netbeans.mdr.handlers.InstanceHandler.getInstanceDelegate(InstanceHandler.java:48)

	at org.netbeans.mdr.handlers.InstanceHandler._handleGet(InstanceHandler.java:193)

	at org.netbeans.jmi.java.source.JavaClassSource$Impl.getModifiers(Unknown Source)

	at org.netbeans.modules.classmodel.jmiimpl.physical.JavaClassImpl.isInterface(Unknown Source)

	at org.netbeans.jmi.java.source.JavaClassSource$Impl.isInterface(Unknown Source)

	at org.netbeans.modules.javaui.looks.JavaClassLook.iconBase(Unknown Source)

	at org.netbeans.spi.looks.DefaultLook.findIcon(DefaultLook.java:427)

	at org.netbeans.spi.looks.DefaultLook.getIcon(DefaultLook.java:164)

	at org.netbeans.spi.looks.ProxyLook.getIcon(ProxyLook.java:340)

	at org.netbeans.api.looks.LookNode.getIcon(LookNode.java:622)

	at org.openide.explorer.view.NodeRenderer$Tree.getTreeCellRendererComponent(NodeRenderer.java:255)

	at org.openide.explorer.view.NodeRenderer.getTreeCellRendererComponent(NodeRenderer.java:101)

	at javax.swing.plaf.basic.BasicTreeUI.paintRow(BasicTreeUI.java:1375)

	at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1171)

	at javax.swing.plaf.metal.MetalTreeUI.paint(MetalTreeUI.java:143)

	at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)

	at javax.swing.JComponent.paintComponent(JComponent.java:537)

	at javax.swing.JComponent.paint(JComponent.java:804)

	at org.openide.explorer.view.TreeView$ExplorerTree.paint(TreeView.java:1432)

	at javax.swing.JComponent.paintChildren(JComponent.java:643)

	at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4742)

	at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4688)

	at javax.swing.JComponent._paintImmediately(JComponent.java:4632)

	at javax.swing.JComponent.paintImmediately(JComponent.java:4464)

	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:404)

[catch] at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:117)

	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)

	at java.awt.EventQueue.dispatchEvent(EventQueue.java:443)

	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:191)

	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)

	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)

	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)

	at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)