May you please look at this code and advice why the output isn't one of levels defines; 
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

my @output = `./retrieve 2301`;

my ($name, $status, $cid);
my $deref="LEVEL0";
my %vars = (
    'NAME' => \$name,
    'CID'  => \$cid,
    'STATUS' => \$status,
);

for my $line (@output) {
    $deref= "LEVEL1";
    my ($key, $val) = split /:/, $line, 2;

    $deref="LEVEL2";

    if ($vars{ $key }) {
        ${ $vars{ $key } } = $val;
        $deref= "LEVEL3";
    } else {
        warn "Unknown key '$key', discarded";
        $deref= "LEVEL5";
    };
};

my $hashref = \%vars;

print "\n$deref\n";
print "\n$hashref->{CID}\n";
print "\n$hashref->{NAME}\n";
print "\n$hashref->{STATUS}\n";

[download]

And the output is 
CID: 2301
NAME:Jane
STATUS:OK

LEVEL0

SCALAR(0x8870e78)

SCALAR(0x8870e60)

SCALAR(0x8870e30)

[download]

Note that only LEVEL0 output is displayed. I have also notice that, the output for CID, NAME and STATUS are from ./retrieve backquotes.

In reply to Re^5: Retrieving information from an executable program by kitifu
in thread Retrieving information from an executable program by kitifu

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