Regarding Net::FTP, you can't run a perl script on the remote server, but you can certainly apply error checking to any Net::FTP method you're calling (from the Net::FTP manpage): 
    $ftp->cwd("/pub")
             or die "Cannot change working directory ",
                $ftp->message;

[download]
Regarding Net::Telnet, a command executed on the remote side will return its output lines (from the Net::Telnet manpage): 
    @lines = $t->cmd("who");

[download]
If your script on the remote side prints messages when it encounters an error, just check if @lines matches this pattern. Additionally, you could add echo $? to have the remote side print the exit code of the remote command/script right after it's done: 
    @lines = $t->cmd('who; echo status=$?');

[download]
Then grep for /status=\d+/ in @lines.

In reply to Re: how to get back a exit status using Net::Telnet by saintmike
in thread how to get back a exit status using Net::Telnet by Anonymous Monk

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.