Grasping at straws...

Do you have a package statement between the use Date::Calc and the call to Delta_Days?

Do you have warnings enabled?

Does this happen only in the debugger?

Did you manually move Calc.pm, instead of using Makefile.PL or ppm to install it correctly?

Does changing it to call Date::Calc::Delta_Days help?

What does this show (just before the Delta_Days call): 

use Data::Dumper;
print STDOUT Dumper($syyyy,$smm,$sdd,$eyyyy,$emm,$edd);

[download]

In reply to Re: use Date::Calc qw(Delta_Days) by ysth
in thread use Date::Calc qw(Delta_Days) 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.