Hello everyone.. I was trying to create an i-stat summary for my multi VCF samples. It works normally, but for some reason when I try to exclude a few individuals, it doesn't seem to work.

1st I created a pseq project

<path>/pseq MyProject new-project

Then I indexed my vcfs into this directory

<path>/pseq MyProject index-vcf --vcf <path>/multivcf.recode.vcf.bgzf.gz

Then I tried to run an i-stat job

<path>/pseq MyProject i-stat--mask indiv.ex=@a.txt>MyProject_istat.out

where a.txt is a text file containing the IDs of all the individuals I would like to exclude from my i-stat analysis.

The last step is not working. It is not excluding those individuals. Why? Please help.