Unconfigured Ad

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts
  • biochemMScstudent
    Junior Member
    • Aug 2012
    • 3

    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.

    Comment

    Latest Articles

    Collapse

    • GATTACAT
      Reply to Nine Things a Sample Prep Scientist Thinks About Before Sequencing
      by GATTACAT
      Love this - good data definitely starts from good input, and poor input can only give relatively poor data. I particularly like the mention of Nanodrop/absorbance based methods for quantification. It's such a toss up if you'll get an accurate reading or what amounts to a randomly generated number, and a lot of library/sequencing related issues can be traced back to poor quant.
      07-01-2026, 11:43 AM
    • SEQadmin2
      Nine Things a Sample Prep Scientist Thinks About Before Sequencing
      by SEQadmin2


      I’m not a sequencing expert. I’m a purification scientist who uses NGS to evaluate workflows my group develops. With this perspective, we think about the sample first and the NGS workflow second. The sequencer is an exceptionally honest reporter, but it can only report on what you give it, so whether you get clean, interpretable data from an NGS workflow is largely determined before you begin.

      Here are nine questions we think about, in roughly the order they matter, before...
      06-18-2026, 07:11 AM

    ad_right_rmr

    Collapse

    News

    Collapse

    Topics Statistics Last Post
    Started by SEQadmin2, Today, 11:05 AM
    0 responses
    6 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 07-02-2026, 11:08 AM
    0 responses
    27 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 06-30-2026, 05:37 AM
    0 responses
    25 views
    0 reactions
    Last Post SEQadmin2  
    Started by SEQadmin2, 06-26-2026, 11:10 AM
    0 responses
    25 views
    0 reactions
    Last Post SEQadmin2  
    Working...