Look at line 2147 of the data.
This could be a blank line?

Perhaps a regex is better? 

#!/usr/bin/perl
use strict;
use warnings;
$|=1; #turn of buffering for STDERR


while (my $line = <DATA>)
{
   next unless $line =~ /\S/; #skip blank lines
   
   my ($label, $data) = $line =~ /\s*(\w+)\s*=\s*(\w+)/;
   die "bad line: $line" unless defined $data;
   
   print "label $label is: $data\n";
   
}

=prints
label a is: 3
label b is: 4
label c is: 55
label d is: 99
bad line: x=

Process completed with exit code 255

=cut


__DATA__
a = 3

b=4
  c = 55       
  d=99
x=

[download]

In reply to Re: Use of uninitialized value $data by Marshall
in thread Use of uninitialized value $data by ImJustAFriend

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.