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ReduceReads Code exception

Hi there, I've tried to run ReduceReads for the first time and I got this error:

`$ java -Xmx8g -jar /lustre1/tools/bin/GenomeAnalysisTK-2.3-6.jar -T ReduceReads -R /lustre1/genomes/hg19/fa/hg19.fa -I filein.bam -o fileout.bam
[…]

ERROR ------------------------------------------------------------------------------------------
ERROR stack trace

java.lang.NullPointerException
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.SingleSampleCompressor.closeVariantRegions(SingleSampleCompressor.java:83)
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.MultiSampleCompressor.closeVariantRegionsInAllSamples(MultiSampleCompressor.java:94)
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.MultiSampleCompressor.addAlignment(MultiSampleCompressor.java:76)
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.ReduceReadsStash.compress(ReduceReadsStash.java:67)
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.ReduceReads.reduce(ReduceReads.java:387)
at org.broadinstitute.sting.gatk.walkers.compression.reducereads.ReduceReads.reduce(ReduceReads.java:87)
at org.broadinstitute.sting.gatk.traversals.TraverseReadsNano$TraverseReadsReduce.apply(TraverseReadsNano.java:226)
at org.broadinstitute.sting.gatk.traversals.TraverseReadsNano$TraverseReadsReduce.apply(TraverseReadsNano.java:215)
at org.broadinstitute.sting.utils.nanoScheduler.NanoScheduler.executeSingleThreaded(NanoScheduler.java:254)
at org.broadinstitute.sting.utils.nanoScheduler.NanoScheduler.execute(NanoScheduler.java:219)
at org.broadinstitute.sting.gatk.traversals.TraverseReadsNano.traverse(TraverseReadsNano.java:91)
at org.broadinstitute.sting.gatk.traversals.TraverseReadsNano.traverse(TraverseReadsNano.java:55)
at org.broadinstitute.sting.gatk.executive.LinearMicroScheduler.execute(LinearMicroScheduler.java:83)
at org.broadinstitute.sting.gatk.GenomeAnalysisEngine.execute(GenomeAnalysisEngine.java:281)
at org.broadinstitute.sting.gatk.CommandLineExecutable.execute(CommandLineExecutable.java:113)
at org.broadinstitute.sting.commandline.CommandLineProgram.start(CommandLineProgram.java:237)
at org.broadinstitute.sting.commandline.CommandLineProgram.start(CommandLineProgram.java:147)
at org.broadinstitute.sting.gatk.CommandLineGATK.main(CommandLineGATK.java:91)

ERROR ------------------------------------------------------------------------------------------
ERROR A GATK RUNTIME ERROR has occurred (version 2.3-6-gebbba25):
ERROR
ERROR Please visit the wiki to see if this is a known problem
ERROR If not, please post the error, with stack trace, to the GATK forum
ERROR Visit our website and forum for extensive documentation and answers to
ERROR commonly asked questions http://www.broadinstitute.org/gatk
ERROR
ERROR MESSAGE: Code exception (see stack trace for error itself)
ERROR ------------------------------------------------------------------------------------------

`
Is there something wrong with running RR with multiple samples?

d

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