ribotish quality: error: argument -d: expected one argument

[yycunc]

Hi, when I wanted to use option -d to define the position range near start codon or stop codon, I met such an error:

ribotish quality: error: argument -d: expected one argument

My command line is:

ribotish quality -b D0_1.unique_mapped.sorted.bam -g Mus_musculus.GRCm39.103.chr.gtf -d -20,60

Would you please show me how to customize the position range?

Thanks a lot!