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getting 'Segmentation fault' while writing pseudoalignments to BAM format in kallisto version 0.50.1 #476

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saurabhinfocusp opened this issue Jan 9, 2025 · 3 comments

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@saurabhinfocusp
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I was running following commands in v0.50.1, but I am unable to generate pseudoalignments bam file (getting Segmentation fault** ) as it was generating in v0.48

Kallisto quant   -i kallisto_index/Zm-B73-REFERENCE-NAM-5.0.idx   -o output_directory-no-jump --no-jump -t 20 --pseudobam ./../sra_data_download/PRJNA1201562/SRR31818013_1.fastq.gz ./../sra_data_download/PRJNA1201562/SRR31818013_2.fastq.gz 

[quant] fragment length distribution will be estimated from the data
[index] k-mer length: 31
[index] number of targets: 687
[index] number of k-mers: 820,598,382
[quant] running in paired-end mode
[quant] will process pair 1: ./../sra_data_download/PRJNA1201562/SRR31818013_1.fastq.gz
                             ./../sra_data_download/PRJNA1201562/SRR31818013_2.fastq.gz
[progress] 24M reads processed (90.6% mapped)              done
[quant] processed 25,108,718 reads, 22,755,468 reads pseudoaligned
[quant] estimated average fragment length: 322.4
[   em] quantifying the abundances ... done
[   em] the Expectation-Maximization algorithm ran for 463 rounds
**[  bam] writing pseudoalignments to BAM format .. Segmentation fault**

Provide me best possible solution for same

@Yenaled
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Yenaled commented Jan 9, 2025

Pseudobam files are not supported in versions 50+

@SouthernCD
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SouthernCD commented Jan 10, 2025

When running kallisto 0.51.1, even without pseudobam, I got 'Segmentation fault'.

kallisto quant -i Sbicolor_730_v5.1.transcript_primaryTranscriptOnly.fa.kallisto_index -o output_dir -b 100 --bias -t 8 SRR13367649_1.trim.fq.pe.20.fastq SRR13367649_2.trim.fq.pe.20.fastq

[quant] fragment length distribution will be estimated from the data
[index] k-mer length: 31
[index] number of targets: 32,160
[index] number of k-mers: 58,225,694
[quant] running in paired-end mode
[quant] will process pair 1: SRR13367649_1.trim.fq.pe.20.fastq
                             SRR13367649_2.trim.fq.pe.20.fastq
[quant] finding pseudoalignments for the reads ... done
[quant] learning parameters for sequence specific bias
[quant] processed 5 reads, 4 reads pseudoaligned
[quant] estimated average fragment length: 208
[   em] quantifying the abundances ...Segmentation fault

@Yenaled
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Yenaled commented Jan 10, 2025

bias is not supported either (and even in older versions of kallisto, we don’t really recommend bias)

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