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  • biochemMScstudent
    Junior Member
    • Aug 2012
    • 3

    #1

    samtools segmentation fault pileup

    Hi, I am trying to create a pileup on samtools (v.0.1.8-20) from sorted bam files generated by CASAVA version 1.8 (Illumina GAIIe) but am getting a segmentation fault error. I removed duplicates using samtools rmdup, converted bam>sam, imported my FASTA reference genome, SAM file and BAM file and submitted the following job:

    sqsub -r 12h --memperproc=20G -o Lane3-no-duplicates-pileup.txt samtools pileup -vcf hg19-name-fixed.fa Lane3-sorted-no-duplicates.bam

    And the following error message was returned:

    /var/spool/torque/mom_priv/jobs/5716617.krasched.SC: line 3: 13118 Segmentation fault samtools pileup -vcf hg19-name-fixed.fa Lane3-sorted-no-duplicates.bam

    I don't think memory is an issue, I have indexed the bam file and reference FASTA file so I don't think that is the problem. I have also run a pileup directly on the bam file CASAVA produces (which also contained the indexed version) and I get the same segmentation fault. I have run pileups on sam files from the earlier version (1.7) of CASAVA with no problems, but when I try to do the same on bam files generated on the new version of CASAVA I get the error message shown above. If anyone can help me interpret that error message it would be greatly appreciated. Thanks!
  • swbarnes2
    Senior Member
    • May 2008
    • 910

    #2
    I don't see why you are converting to sams at all.

    Pileup is deprecated in newer version of samtools, which means it's going to be harder to get help.

    I'd try getting a newer samtools, and try mpileup before trying to make deprecated software work.

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