java.lang.NullPointerException
   at com.jtattoo.plaf.BaseSliderUI.paintThumb(BaseSliderUI.java:0)
   at com.jtattoo.plaf.BaseSliderUI.paint(BaseSliderUI.java:0)
   at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
   at javax.swing.JComponent.paintComponent(JComponent.java:778)
   at javax.swing.JComponent.paint(JComponent.java:1054)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paint(JComponent.java:1063)
   at javax.swing.JLayeredPane.paint(JLayeredPane.java:585)
   at org.netbeans.modules.form.FormDesigner$6$1.paint(FormDesigner.java:675)
   at javax.swing.JComponent.paintChildren(JComponent.java:887)
   at javax.swing.JComponent.paintToOffscreen(JComponent.java:5228)
   at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1482)
   at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1413)
   at javax.swing.RepaintManager.paint(RepaintManager.java:1206)
   at javax.swing.JComponent.paint(JComponent.java:1040)
   at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
   at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78)
   at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115)
   at java.awt.Container.paint(Container.java:1967)
   at java.awt.Window.paint(Window.java:3867)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:781)
   at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:728)
   at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:677)
   at javax.swing.RepaintManager.access$700(RepaintManager.java:59)
   at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1621)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)