Radoop Read CSV process failing

I am using the Read CSV operator inside of a Radoop Nest. I exported a csv file from Excel and everything worked fine. Then I created another file and when I try to run the operator, I get the error "Process failed: / by zero." The first file is the only one that works. I can copy it and the copy will work as long as I don't make any changes to it. Any other file, whether I export from Excel or just use Notepad, will give the same error. The files contain a single column of integers.