Hello, I tried to use NGS: SAM Tools ->flagstat on a BAM files for basic stats, but I got results like you see below. It doesn't seem to be working. Any suggestions? 26584869 in total 0 QC failure 0 duplicates 26584869 mapped (100.00%) 0 paired in sequencing 0 read1 0 read2 0 properly paired (-nan%) 0 with itself and mate mapped 0 singletons (-nan%) 0 with mate mapped to a different chr 0 with mate mapped to a different chr (mapQ>=5) Thanks Slim The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.