Dear Masters,
I have the following directory structure for storing my code and one binary executable use by the Perl's code.

~/MyPerl
    |
    |
    |__ src/
          |_ mycode.pl
          |
          |_ a_program.out
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Currently in mycode.pl, I have

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
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Although I have no problem running the following:

~/MyPerl $ perl -c src/mycode.pl
mycode.pl syntax OK
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But I have problem when doing this:

~/MyPerl $ perl src/mycode.pl
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It gives:

Can't exec "./a_program.out": No such file or directory at
src/mycode.pl line 217.
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I've tried setting full path under backtick also but it still give the same error. What's wrong with my path setting under backtick? Did I miss anything?

Update: Thanks a lot for the answer. It works fine now.