GCTA on non-model organisms with scaffols

Hello.

Thanks for making GCTA available. I am running an analysis with a non-model species where I have about 300K SNPs located on about 30K unlinked scaffolds. Therefore, there is no information about chromosome and I am not being able to run gcta. I could not find a similar thread on this board, so I appreciate if you could point me to it or help me use gcta under these conditions.

I am running the following code:

gcta64 --bfile $PROJ_CODE --make-grm --autosome --out $PROJ_CODE

But receive the following error:
version 1.26.0
Reading PLINK FAM file from [$PROJ_CODE.fam].
64 individuals to be included from [$PROJ_CODE.fam].
Reading PLINK BIM file from [$PROJ_CODE.bim].
1 SNPs to be included from [$PROJ_CODE.bim].
0 SNPs from chromosome 1 to chromosome 22 are included in the analysis.

Error: No SNP is retained for analysis.

I can run associations with this dataset on plink adding commands --allow-extra-chr --allow-no-sex. Is there something similar in gcta?

Thanks in advance.
Leandro