Choroba, thanks. Your syntax gave me a clue that leads to a solution (XSH2 is not in the ppm library for Activestate and since it took almost all day to load LibXML I am reluctant to go down that path). Here is my solution, albeit a little more verbose...the syntax is at least obvious which is a benefit for simpletons like myself!

my ($value) = $root->findnodes('/Settings[1]/Channels[1]/Channel[@Name
+="Ln"]/@Voltage ');
$value->setValue($new_voltage);}

[download]

So now my question is, does the above get me into any trouble??? Thanks Again Chris

In reply to Re^2: how to change node value based on other node value by ccherri
in thread how to change node value based on other node value by ccherri

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.