I am trying to predict operons in a genome of interest using DOOR2 pipeline http://csbl.bmb.uga.edu/DOOR/annotate.php . When I load my files to send to the server, I get the following message: "Please specify the fna file." The problem is that I am sending an fna file downloaded from Genbank. I have tried to contact the authors, but I have gotten no response.
Do you know what could be wrong? Do you know alternative softwares for operon prediction?