Pierre,
Thank you for a quick reply, and for suggesting gzip --test .
S4_L002_R2_001.fastq.gz failed the gzip test. I also looked into my fastQC results and realized that this file failed at fastQC check as well. I started my analysis with fastq files and Lane 2 R2 file seems to be the issue. It looks like I need to re-generate fastq files from bcl files for this sample using bcl2fastq2, Please let me know if there is an alternative solution. Thank you again.
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*** gzip test ***
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[sgr@genlabcs 0200_FASTQ]$
[sgr@genlabcs 0200_FASTQ]$ gzip --test S4_L002_R1_001.fastq.gz
[sgr@genlabcs 0200_FASTQ]$
[sgr@genlabcs 0200_FASTQ]$ gzip --test S4_L002_R1_001.fastq.gz S4_L002_R2_001.fastq.gz
gzip: S4_L002_R2_001.fastq.gz: invalid compressed data--format violated
[sgr@genlabcs 0200_FASTQ]$
[sgr@genlabcs 0200_FASTQ]$
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*** fastQC log file ***
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Started analysis of S4_L002_R2_001.fastq.gz
Approx 5% complete for S4_L002_R2_001.fastq.gz
Approx 10% complete for S4_L002_R2_001.fastq.gz
Approx 15% complete for S4_L002_R2_001.fastq.gz
Approx 20% complete for S4_L002_R2_001.fastq.gz
Approx 25% complete for S4_L002_R2_001.fastq.gz
Approx 30% complete for S4_L002_R2_001.fastq.gz
Approx 35% complete for S4_L002_R2_001.fastq.gz
Approx 40% complete for S4_L002_R2_001.fastq.gz
Approx 45% complete for S4_L002_R2_001.fastq.gz
Approx 50% complete for S4_L002_R2_001.fastq.gz
Approx 55% complete for S4_L002_R2_001.fastq.gz
Approx 60% complete for S4_L002_R2_001.fastq.gz
Approx 65% complete for S4_L002_R2_001.fastq.gz
Approx 70% complete for S4_L002_R2_001.fastq.gz
Approx 75% complete for S4_L002_R2_001.fastq.gz
Failed to process file S4_L002_R2_001.fastq.gz
uk.ac.babraham.FastQC.Sequence.SequenceFormatException: ID line didn't start with '@'
at uk.ac.babraham.FastQC.Sequence.FastQFile.readNext(FastQFile.java:158)
at uk.ac.babraham.FastQC.Sequence.FastQFile.next(FastQFile.java:125)
at uk.ac.babraham.FastQC.Analysis.AnalysisRunner.run(AnalysisRunner.java:76)
at java.lang.Thread.run(Thread.java:745)
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