I debugged a similar problem but not same yesterday/today by chance. See https://rt.cpan.org/Ticket/Display.html?id=50374. When you use the run box, there is no shell/cmd prompt. MSDOS Batch language is not available from the run box. Expect to find a '>' in your @ARGV if you use the run box. You need to type "cmd /c perl foo.pl > text.txt" into run box so the shell processes it and launches perl, not the run box.

In reply to Re: Perl in Windows - STDOUT to file Behavior difference by run context by bulk88
in thread Perl in Windows - STDOUT to file Behavior difference by run context by AngelOnTheSideline

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.