Here's where the wiki is located...I don't know WHY there's no link for it on this section of the site. There really should be one.

http://docs.buyscripts.in/Main_Page

Search the forums for "smarty error" you'll get a few forum threads on that like this one:

viewtopic.php?f=12&t=1659

And this may also be of great help:

http://www.smarty.net/manual/en/languag ... on.php.php