I have a plink file that someone gave me. I wan't to use it in an analysis where I know that the major allele needs to be set to the plus strand of the GRCh37 assembly.

I try:

plink2 --bfile {my_fav_file} --make-bed --ref-from-fa --fa {ref_fa} --out {my_fav_file_new}

I get:

Error: Unrecognized flag ('--ref-from-fa')

I did not copy paste any of the command and tried typing it out a few times. Am I misunderstanding what this command is supposed to do? Any help is greatly appreciated.