title: rspec error 'report_activate_error': Could not find RubyGem rspec-core (>=0) (Gem:LoadError)
body: <p>I have a seemingly simple error but I can't seem to figure out what to do to resolve it. I have tried uninstalling and reinstalling but that hasn't helped me out. I am new to the terminal and to ruby/ruby on rails, so forgive my potentially stupid question. Does anyone know how to resolve this issue?</p>
  
  <p>This is the exact error message I get when I try to run rspec.</p>
  
  <p>/opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:827:in <code>report_activate_error': Could not find RubyGem rspec-core (&gt;= 0) (Gem::LoadError)
   from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:261:in</code>activate'
   from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:68:in `gem'
   from /usr/local/bin/rspec:18</p>
  
  <p>Any help would be greatly appreciated. I am currently doing the RoR tutorial and can't get this to work...</p>
  
  <p>Thanks in advance!</p>