Fatal error: Call to undefined function (Post Theme by Moon Themes)

Hey all!

I recently installed the following Post Theme by Moon Themes:

http://www.moonthemes.com/themes/the-post-minimal-and-simple-free-premium-wordpress-theme/

Just wanted to test it out to see whether it was going to work with what I want but on the homepage it’s coming up with the following error message:

Fatal error: Call to undefined function the_content_limit() in /home/spiffing/public_html/wordpress/wp-content/themes/posttheme/layout/default.php on line 29

When I pull up the coding for line 29 under the default.php it looks like this:

<div class=”post-description-1″><?php the_content_limit(151); ?></div>

Anyone have any ideas how to resolve this issue? Relative newbie when it comes to wordpress… well I say I am but I dabble about in it here and there and can meander around it okayish so please hang in there with me if I ask silly questions 😉

Oh… side note… don’t know if this has any affect on the site when I installed it, the zip file I had downloaded for it said it was missing the style.css details… which it wasn’t. The zip file was a file within a file… within a file though so I opened it and rezipped it and it worked!

Thanks all 🙂