use strict;
use warnings;
use diagnostics;

my $daTime = "0x506143ca";
print scalar localtime $daTime, "\n";

##</code><code>##

Argument "0x506143ca" isn't numeric in localtime at mytest.pl line 10 (#1)
    (W numeric) The indicated string was fed as an argument to an operator
    that expected a numeric value instead.  If you're fortunate the message
    will identify which operator was so unfortunate.
    
Wed Dec 31 16:00:00 1969