You sir are my hero!
"somewhere else" is the key and I'm embarassed that I spent hours on this error.
I noticed that I pasted the wrong find command which is related to a different set of files I try to process.
The files from which I get the string starting with 00 are found by another find command for which I forgot to change the "old" call of capture() to capture2().
As said before I switched because of the sporadic ssh connection loss (which is out of scope for this "undef" issue).
But then I forgot that there is a second find/awk command with an additionally condition that works on a subset of files (containing the 00) that "coincidentally" get processed by an additional call of capture() which I forgot to change to capture2().
Basically the string $edr is empty because capture() is returning an array which I afterwards try to fill with a split on an empty $edr.
It's always the simplest error that soaks up the most time for troubleshooting :-)

In reply to Re^2: Confused with Net::OpenSSH - capture2()? by tuckito
in thread Confused with Net::OpenSSH - capture2()? by tuckito

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.