Hi every one

I tried to make PED&MAP files by PLINK from three files that I made it .lgen ,.map &.fam So,error appeared

Error: Variant 'ARS-BFGL-BAC-27364' in .lgen file has 3+ different alleles.

So,the command that I used it ./plink --lfile rustaqi22 --cow --recode

Moreover,example below of rows of my .lgen file

Rustaqi 88 ARS-BFGL-BAC-10172 B B Rustaqi 88 ARS-BFGL-BAC-1020 A B Rustaqi 88 ARS-BFGL-BAC-10245 B B

Could any one advice how to deal with this point?

Thanks