title: Codeigniter "Unable to load the requested file: upload.php"
body: <p>I don't have any idea on what's wrong here:</p>
  
  <p>I have tried:</p>
  
  <pre><code>get_instance()-&gt;load-&gt;library('upload', $config);
  
  $this-&gt;load-&gt;library('upload', $config);
  
  $this-&gt;load-&gt;library('upload'); $this-&gt;upload-&gt;initialize($config);
  </code></pre>
  
  <p>I always get </p>
  
  <pre><code>"Unable to load the requested file: upload.php"
  </code></pre>
  
  <p>The Upload.php file is where it should (system/libraries) and I have no idea at all on this error.
  Works fine on localhost, but not on the server.</p>
  
  <p>Maybe it's because CI is installed on a subdomain? For me all configs are set correctly on CI configs.</p>
  
  <p>Upload.php is a CI class, and for some reason, it's not being found from a controller, and this is quite bizarre to me.</p>
  
  <p>Any clues?</p>