The output of gene prediction algorithms (Prokka) can include ">" characters as part of the gene name, for instance:
>BOGOCDKJ_04879 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase
Currently, BURST checks that the number of ">" characters globally is exactly twice the number of newline characters. Thus, well-formatted FASTA files can throw an error.