java.lang.NullPointerException
        at org.netbeans.modules.vmd.midp.propertyeditors.PropertyEditorComboBoxNoUserCode.getAsText(PropertyEditorComboBoxNoUserCode.java:130)
        at org.openide.explorer.propertysheet.RendererFactory$StringRenderer.reset(RendererFactory.java:967)
        at org.openide.explorer.propertysheet.RendererFactory$StringRenderer.connect(RendererFactory.java:931)
        at org.openide.explorer.propertysheet.RendererFactory.prepareString(RendererFactory.java:372)
        at org.openide.explorer.propertysheet.RendererFactory.getRenderer(RendererFactory.java:235)
        at org.openide.explorer.propertysheet.SheetCellRenderer.getTableCellRendererComponent(SheetCellRenderer.java:153)
        at org.openide.explorer.propertysheet.BaseTable.prepareRenderer(BaseTable.java:608)
        at org.openide.explorer.propertysheet.SheetTable.prepareRenderer(SheetTable.java:538)
        at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
        at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
        at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1770)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143)
        at javax.swing.JComponent.paintComponent(JComponent.java:763)
        at org.openide.explorer.propertysheet.BaseTable.paintComponent(BaseTable.java:972)
        at org.openide.explorer.propertysheet.SheetTable.paintComponent(SheetTable.java:444)
        at javax.swing.JComponent.paint(JComponent.java:1027)
        at org.openide.explorer.propertysheet.BaseTable.paint(BaseTable.java:658)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JViewport.paint(JViewport.java:747)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5122)
        at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1382)
        at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1313)
        at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:301)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1128)
        at javax.swing.JComponent._paintImmediately(JComponent.java:5070)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4880)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:723)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:679)
        at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:659)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)