You have to put your hash out of the while loop. 

#!/usr/bin/perl -w
use strict;
use Data::Dumper;


my %IACISBN_ENUM;

while ( my $line = <DATA> ) {
    chomp($line);

    my ( $IacIsbn, $Title, $EPI, $BundleCode ) = split( "\t", $line );

    $IACISBN_ENUM{$IacIsbn} =
      { 'Title' => $Title, 'EPI' => $EPI, 'Bundle' => $BundleCode };

}
print Dumper \%IACISBN_ENUM;

__END__
IacIsbn Title   EPI     BundleCode

[download]


hth,
PooLpi

The stone that the builder refused, will always be the head cornerstone.
[ Robert Nesta MARLEY ]

In reply to Re: Hash of Hashes not filling - only using last line of file by poolpi
in thread Hash of Hashes not filling - only using last line of file by kdmurphy001

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.