Applying Patches to Drupal modules - How to deal with error messages?
Thanks for all the help. I worked this out!

When I was applying the patch, I placed the patch file in the root module directory. But it actually has to go inside in the directory of the actual module. Whoops!

E.g. 

The patch goes inside of sites&gt;all&gt;modules&gt;views_calc
and not inside of sites&gt;all&gt;modules.