Cache closing tag error I'm trying to using craft caching to cache a page without query string vars. 

This tag

{% cache using key craft.request.path  %}

{% endcache %}


throws an error 

Unexpected token "name" of value "using" ("end of statement block" expected) 

This example is right from the Craft Docs, https://craftcms.com/docs/templating/cache

If I remove the "using ..." everything works fine.

Any ideas?
Make sure you're running the latest version of Craft.  using key didn't come until Craft 2.2.