Hello, I was doing this step of Taxonomic Classification using the Demovir. I followed all the steps given in [1] but then, in this step /path_to_demovir/demovir.sh input.fasta threads the command is not running properly,

The error I am getting is:

sort: cannot read: trembl_ublast.viral.txt: No such file or directory

rm: cannot remove ‘AA.fasta’: No such file or directory

rm: cannot remove ‘trembl_ublast.viral.txt’: No such file or directory

Error in read.table(file = file, header = header, sep = sep, quote = quote,  : 

  no lines available in input

Calls: read.delim -> read.table
Execution halted

Please if anyone can help me in knowing this error so that I can troubleshoot this.?