~/MyPerl
    |
    |
    |__ src/
          |_ mycode.pl
          |
          |_ a_program.out


##</code><code>##

use strict;
use warnings;

my @output = `./a_program.out -f someparam`;  # line 217

# This also does not work
# my @output = `home/myname/MyPerl/src/a_program.out -f someparam`;

chomp @output;

# do something with @output
# Rest of the code

##</code><code>##

~/MyPerl $ perl -c src/mycode.pl
mycode.pl syntax OK

##</code><code>##

~/MyPerl $ perl src/mycode.pl

##</code><code>##

Can't exec "./a_program.out": No such file or directory at
src/mycode.pl line 217.