Not sure why you're showing two different code samples. Is it that the latter one works?

In the first code sample:

Try making sure you are indeed opening the file. "Can't call method Worksheets on an undefine value" suggests you haven't opened it. Uncomment the "die on errors" line. And/or check the return code: 

my $Book = $Excel->Workbooks->Open("Reten_template.xls") || die "can't
+ open file";

[download]
Then try displaying all the sheets to make sure you have the right name: 
for (1..$Book->Worksheets->Count) {
    print "$_: <", $Book->Worksheets($_)->Name, ">\n";
}

[download]

By the way, here's a good way to make sure you have the full path of the file name: 

# open Excel file
use File::Spec;
my $file = File::Spec->rel2abs("Reten_template.xls");
my $Book = $Excel->Workbooks->Open($file) or die "can't open $file: $!
+\n";

[download]
If you manage to open the Excel file, and you have the right name, then this should work: 
my $Sheet = $Book->Worksheets('JUN05');

[download]

In reply to Re: Accessing Worksheet name in excel by Tortue
in thread Accessing Worksheet name in excel 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.