Merging more than two files with plink

Question

[phmai1148]

I am trying to merge seven bed/bim/fam files in plink using the following code: Plink —bfile chr2 —merge-list all_files.txt —make-bed —out merged

The (all_files.txt): chr3.bed chr3.bim chr3.fam chr9.bed chr9.bim chr9.fam chr12.bed chr12.bim chr12.fam chr15.bed chr15.bim chr15.fam chr16.bed chr16.bim chr16.fam chr17.bed chr17.bim chr17.fam

However, it gives me this error: unrecognized flag (—merge-list). Any help please?

Answer 1

[chrchang523]

1. Please post the full .log file (including the version string) when asking a question like this, rather than just the final error message.
2. My guess is that you are running an old plink 2.0 build. Either update your build (in which case it will at least print a different error message instructing you to use --pmerge-list), or use plink 1.9 for this operation.