Installing W3C markup validator - stuck on step 5

I'm trying to set up the validator on my computer at work (it's a Mac) and
I get an error when I do the last part of step 4 (testing the validator
This is the html that it outputs:

<h1>Software error:</h1>

<pre>Can't locate SGML/Parser/ in @INC (@INC contains:
/Library/Perl/5.16/darwin-thread-multi-2level /Library/Perl/5.16
/System/Library/Perl/Extras/5.16) at ./check line 64.

BEGIN failed--compilation aborted at ./check line 64.



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and the time and date of the error.


It seems at first glance that the problem is that part of the DTD library
didn't install correctly, and I'm not really sure how to troubleshoot this.
Thanks for your help!

- Mikkel Sandberg

Received on Monday, 30 March 2015 08:26:19 UTC