java.lang.NullPointerException
   at com.sun.java.swing.plaf.windows.WindowsProgressBarUI.getBox(WindowsProgressBarUI.java:272)
   at javax.swing.plaf.basic.BasicProgressBarUI.setAnimationIndex(BasicProgressBarUI.java:942)
   at com.sun.java.swing.plaf.windows.WindowsProgressBarUI.setAnimationIndex(WindowsProgressBarUI.java:212)
   at javax.swing.plaf.basic.BasicProgressBarUI.incrementAnimationIndex(BasicProgressBarUI.java:1000)
   at javax.swing.plaf.basic.BasicProgressBarUI$Animator.actionPerformed(BasicProgressBarUI.java:1208)
   at javax.swing.Timer.fireActionPerformed(Timer.java:313)
   at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
   at java.awt.EventQueue.access$400(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:697)
   at java.awt.EventQueue$3.run(EventQueue.java:691)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)