Nothing in the output figure

[jiadong324]

Dear author,

Thanks for developing this nice visualization tool!

I am trying to make a plot between two sequences. The dotplot below is obtained with simple k-mer matches.

But when I use moddotplot for these two sequences, I got the figure below. This is my command moddotplot static -f NA12877_pat-0000377_chr22.fa --no-hist --no-bed -o dotplot --compare

Is this the parameter issues or something else?