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Hi Eugene, just ignore it. This execption means that some of your declared histograms did not get any entry (so remains empty). Nick Eugene Guillian wrote: > Hi Everyone, > > I'm trying to run TrackReco, but I get a NullPointerException at > jas.job.JobHistogram.setSnapshot(JobHistogram.java). This code worked > before the JAS version 0.98 upgrade. Do any of you know what could be > wrong? Is it necessary to update class libraries? > > Gene