Error in Demovir

Hi,

I am new to bioinformatics and am working on viral metagenomic (virome) datasets and so would like to use Demovir for getting taxonomic annotations on my viral contigs.

I almost completed it but got stuck in the last command when running demovir.R:

$Rscript demovir.R

Then, I got an error as follows:

Error in data.frame(levels(results3$contig), taxassO, margin_o, taxassF, :
arguments imply differing number of rows: 0, 28712
Execution halted

Does anyone know how to solve it to generate final output please? Many thanks in advance.

Ernie