I have a gem installed but require 'gemname' does not work. Why?

Question

The question I\'m really asking is why require does not take the name of the gem. Also, In the case that it doesn\'t, what\'s the easiest way to find the secret incantation

Answer 1

I too had this problem since installing OS X Lion, and found that even if I ran the following code I would still get the warning message. require 'rubygems' require 'nokogiri'

I tried loads of solutions posted here and on the web, but in the end my work around solution was to simply follow the instructions at http://martinisoftware.com/2009/07/31/nokogiri-on-leopard.html to reinstall LibXML & LibXSLT from source, but ensuring the version of LibXML I installed matched the one that was expected by Nokogiri.

Once I had done that, the warnings went away.