mitochondrial refcds error

[moshl]

Hi, im3sanger
I encountered some problems with mitochondrial Dn/Ds analysis. Fisrtly, I obtained the CDS file (
BioMart_hg38_chrM_segment.txt
) for mitochondrial transcripts from Ensembl BioMart. I also download the corresponding FASTA file (
chrM.fa.txt
) . After that, I used the buildref function to create the refcds.rds file. But the resulting rds file just contains only one gene, MT-ND4L.
As a result, I am experiencing errors when running dndscv as below.

Looking forward your suggestions!

Thanks!
Mo