Hi Jeremy, 

I'm seeing the following error  when I'm running off an EVIO file (hps_004889.evio.0 in this case):

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
Exception in thread "AWT-EventQueue-0" java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at hep.aida.jfree.renderer.MultiGradientScale.getColor(MultiGradientScale.java:52)
at hep.aida.jfree.renderer.MultiGradientScale.getColor(MultiGradientScale.java:13)
at hep.aida.jfree.renderer.AbstractPaintScale.getPaint(AbstractPaintScale.java:62)
at hep.aida.jfree.renderer.XYVariableBinWidthBlockRenderer.drawItem(XYVariableBinWidthBlockRenderer.java:78)
at org.jfree.chart.plot.XYPlot.render(XYPlot.java:3738)
at org.jfree.chart.plot.XYPlot.draw(XYPlot.java:3271)
at org.jfree.chart.JFreeChart.draw(JFreeChart.java:1229)
at org.jfree.chart.ChartPanel.paintComponent(ChartPanel.java:1624)
at javax.swing.JComponent.paint(JComponent.java:1053)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5223)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1572)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1495)
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:306)
at javax.swing.RepaintManager.paint(RepaintManager.java:1265)
at javax.swing.JComponent._paintImmediately(JComponent.java:5171)
at javax.swing.JComponent.paintImmediately(JComponent.java:4982)
at javax.swing.RepaintManager$4.run(RepaintManager.java:824)
at javax.swing.RepaintManager$4.run(RepaintManager.java:807)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:807)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:782)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:731)
at javax.swing.RepaintManager.access$1300(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1720)
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(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
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)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException


I'm also seeing the following warning: 

Wed Apr 22 14:29:35 PDT 2015 org.hps.evio.LCSimTestRunEventBuilder getEventData
WARNING: Readout status is usually 0; got -67633145

Any idea what these are all about?  The first error has something to do with JFree chart so I don't think it's due to running over an EVIO file but the second does.  They aren't causing the run to crash, but the are consistently popping up so I thought I would report them.  I'm see them no matter what steering file I use.  I'm using the following command run to over the file: 

java -cp hps-java-jar org.hps.evio.EvioToLcio -d detector -x steering_file.lcsim file.evio

--Omar Moreno


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