I have a file pattern like this

########################################

require "db/convert/convert_common.pl";
use strict;
use warnings;
use File::Temp qw/ tempfile tempdir /;
sub set_env
{
0 EMD_PERL_DEBUG("convert.set_env(): *** START ***");
0 &set_env_var($_[0], $_[1]);
0 EMD_PERL_DEBUG("convert.set_env(): *** END ***");
}
########################################

Once the require line is hit,there is zero coverage reported for the subsequent sub-routines. Any solutions to this problem?