Why the redundant error error message? A cleaner version was previously suggested to you. 

GetOptions( 'test=s' => \$option_test )
    or exit(1);

defined($option_test)
    or die("Missing argument -t");

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At the very least, remove the line number from the error message. It's useless clutter. 

GetOptions( 'test=s' => \$option_test )
    or die("Invalid command-line option\n");

defined($option_test)
    or die("Missing argument -t\nInvalid command-line option\n");

[download]

However, I suggest that you display a useful error message instead: 

use File::Basename qw( basename );

sub help {
    my $prog = basename($0);
    print("usage: $prog -t [options]\n");
    exit(0);
}

sub usage {
    my $msg = shift || '';
    my $prog = basename($0);
    die("${msg}Use $prog --help for help\n");
}

GetOptions(
    'help|h|?' => \&help,
    'test=s'   => \$option_test,
)
    or usage();

defined($option_test)
    or usage("Missing argument -t\n");

[download]

In reply to Re^2: Requiring option values in Getopt::Long by ikegami
in thread Requiring option values in Getopt::Long by bichonfrise74

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