MLMA on dosage data

Dear all,

I would like to run the MLMA analysis on MaCH dosage data.
When I try using the --mach-dosage-gz input, I get the following message: "Error: can not open the file [.fam] to read."

Is it possible to run the MLMA on dosage data? If not, will this feature be added to a future release of GCTA?
Or is there a workaround? (I would really prefer not to convert the dosage data to hard-called genotypes in plink format).

Thanks in advance!

Frank