Exception while displaying graph properties in tooltip

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at java.util.Arrays.binarySearch(Arrays.java:1417)
at com.affymetrix.genometryImpl.GraphSym.determineBegIndex(GraphSym.java:325)
at com.affymetrix.genometryImpl.GraphSym.getYCoordFromX(GraphSym.java:382)
at com.affymetrix.genometryImpl.GraphSym.getLocationProperties(GraphSym.java:519)
at com.affymetrix.igb.property.PropertyView.getGraphPropertiesRowColumn(PropertyView.java:400)
at com.affymetrix.igb.view.SeqMapView.setToolTip(SeqMapView.java:1946)
at com.affymetrix.igb.view.SeqMapViewMouseListener.mouseMoved(SeqMapViewMouseListener.java:173)
at com.affymetrix.genoviz.widget.NeoWidget.heardMouseEvent(NeoWidget.java:1280)
at com.affymetrix.genoviz.widget.NeoMap.heardMouseEvent(NeoMap.java:1539)
at com.affymetrix.genoviz.widget.NeoAbstractWidget.mouseMoved(NeoAbstractWidget.java:819)
at com.affymetrix.genoviz.bioviews.View.heardMouseEvent(View.java:926)
at com.affymetrix.genoviz.bioviews.View.mouseMoved(View.java:846)
at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:312)
at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:312)
at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:312)
at java.awt.Component.processMouseMotionEvent(Component.java:6419)
at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3285)
at java.awt.Component.processEvent(Component.java:6143)
at java.awt.Container.processEvent(Container.java:2085)
at java.awt.Component.dispatchEventImpl(Component.java:4736)
at java.awt.Container.dispatchEventImpl(Container.java:2143)
at java.awt.Component.dispatchEvent(Component.java:4566)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4621)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4295)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
at java.awt.Container.dispatchEventImpl(Container.java:2129)
at java.awt.Window.dispatchEventImpl(Window.java:2478)
at java.awt.Component.dispatchEvent(Component.java:4566)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:680)
at java.awt.EventQueue.access$000(EventQueue.java:86)
at java.awt.EventQueue$1.run(EventQueue.java:639)
at java.awt.EventQueue$1.run(EventQueue.java:637)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$2.run(EventQueue.java:653)
at java.awt.EventQueue$2.run(EventQueue.java:651)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:650)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
java.lang.ArrayIndexOutOfBoundsException: 170625
at com.affymetrix.genometryImpl.SeqSymSummarizer.getMismatchGraph(SeqSymSummarizer.java:89)
at com.affymetrix.igb.view.DependentData.createMisMatchGraph(DependentData.java:85)
at com.affymetrix.igb.view.DependentData.createTier(DependentData.java:55)
at com.affymetrix.igb.view.TrackView.updateDependentData(TrackView.java:288)
at com.affymetrix.igb.view.load.GeneralLoadUtils$2.runInBackground(GeneralLoadUtils.java:778)
at com.affymetrix.genometryImpl.thread.CThreadWorker.doInBackground(CThreadWorker.java:38)
at javax.swing.SwingWorker$1.call(SwingWorker.java:277)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at javax.swing.SwingWorker.run(SwingWorker.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)