It's better to mark a post as updated. Again without seeing a repeatable example (see previous links) that demonstrates the problem it's difficult to help.

#!/usr/bin/perl
use strict;
use warnings;

my $derp = 'X' x 40000;
open (my $fh, '>', 'derp.txt') or die "can't open derp.txt: $!";
print $fh $derp;
close($fh);

[download]
ls -al derp.txt 
-rw------- 1 marto marto 40000 Sep 21 09:37 derp.txt

[download]

See also open, three arg open, migrating to modern perl.

In reply to Re^5: When can the character length of a Perl Scalar become an issue? by marto
in thread When can the character length of a Perl Scalar become an issue? by misterperl

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.