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  • MDeBiasse
    Junior Member
    • Jul 2014
    • 2

    #1

    Problem calling Fastqc in Trim Galore?

    Hello,
    When running Trim Galore, my .trimmed.fq file is blank and I get an error message. I suspect it is because Fastqc is not installed correctly (?). The output is pasted below. Thank you for any advice!

    ############
    No quality encoding type selected. Assuming that the data provided uses Sanger encoded Phred scores (default)

    Writing report to 'file2.fastq_trimming_report.txt'

    SUMMARISING RUN PARAMETERS
    ==========================
    Input filename: file2.fastq
    Quality Phred score cutoff: 20
    Quality encoding type selected: ASCII+33
    Adapter sequence: 'AGATCGGAAGAGC'
    Maximum trimming error rate: 0.1 (default)
    Minimum required adapter overlap (stringency): 1 bp
    Minimum required sequence length before a sequence gets removed: 20 bp

    Writing final adapter and quality trimmed output to file2_trimmed.fq


    >>> Now performing quality (cutoff 20) and adapter trimming in a single pass for the adapter sequence: 'AGATCGGAAGAGC' from file file2.fastq <<<
    sh: /~Programs/cutadapt: is a directory

    RUN STATISTICS FOR INPUT FILE: file2.fastq
    =============================================
    0 sequences processed in total
    Illegal division by zero at trim_galore.pl line 565.
  • fkrueger
    Senior Member
    • Sep 2009
    • 627

    #2
    It appears that you have specified the path to Cutadapt as the directory and not the executable. Appending cutadapt to the end of the path should fix that problem.

    Cheers, Felix

    Comment

    • MDeBiasse
      Junior Member
      • Jul 2014
      • 2

      #3
      Oh my goodness, silly mistake. Changing the path did fix the problem. Thank you very much Felix!

      Comment

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