Hi,

I have mapped my reads using STAR. Then I am trying to convert the output SAM file to BAM using code below but I get a strange respond. Could somebody tell what I am doing wrong? Thanks in advance.

samtools view -Sb Aligned.out.sam aligned.bam
[samopen] SAM header is present: 6 sequences.
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[main_samview] random alignment retrieval only works for indexed BAM files.
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