This code seems to work for me if I change from nfreeze to freeze as in the code below. I'm not sure what your error means, I was unable to duplicate it. Here are two scripts that I put together to test these routines.
HTH 
#!/usr/bin/perl -w
use CGI;
use Storable qw(freeze);
my $q = CGI->new();

sub make_cookie {
    $q->cookie( -name=>'Test',
                -value=>unpack("H*",freeze(['1245','foo','foopass'])),
                -path=>'/' );
}

print $q->header(-cookie=>make_cookie());
print $q->start_html(-title=>'Test cookie');

print "Cookie Set<br>";

print $q->end_html;

[download]
and this to retrieve the cookie. 
#!/usr/bin/perl -w
use CGI;
use Storable qw(thaw);

my $q = CGI->new();

sub see_cookie {
        @{ thaw( pack("H*",$_[0]) ) };
}

print $q->header();
print $q->start_html(-title=>'Test cookie');

print "Cookie Value: ", (join " -- ", see_cookie($q->cookie('Test')) )
+, "<br>";

print $q->end_html;

[download]
Update:
I tried these scripts under mod_perl also and they work in that enviorment also (Apache::Registry), I would take a look at your Storable module.

In reply to Re: Serializing Cookies ??? by steveAZ98
in thread Serializing Cookies ??? by lindex

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.