Unable to make bed *and* map for convertf

I’m trying to run convertf in the process of running smartpca. However, in the process of preparing files for convertf, I’m getting bizarre errors from plink and/or bcftools that are not getting any answers on online forums or GitHub: https://www.biostars.org/p/9531207/

I make the input file for convertf in perl:

my ($conv_fh, $convert_params_filename) = tempfile(DIR => '.', UNLINK => 0);
say $conv_fh "genotypename: $out_stem.bed";
say $conv_fh "snpname: $out_stem.map";
say $conv_fh "indivname: $fam_file";
say $conv_fh "outputformat: PACKEDANCESTRYMAP";
say $conv_fh "genotypeoutname: $out_stem.geno";
say $conv_fh "snpoutname: $out_stem.snp";
say $conv_fh "indivoutname: $out_stem.ind";
say $conv_fh 'familynames: NO';

but the requirement for having both a bed and a map file is really blocking me from moving on.

Is there some other way that I can run convertf with a VCF, or bed alone, as input to convertf to get the input for smartpca?

Thanks for your help

Start by reproducing the convertf input preparation described in the issue, including the Perl-generated parameter file and the plink or bcftools steps linked through Biostars. Read the convertf and smartpca input documentation or entry points to determine whether VCF or bed-only input is supported; done means establishing a supported path or documenting the required bed/map inputs.