title: Controller file was loaded but class does not exist
body: <p>I am having trouble getting around this error in Magento:</p>
  
  <p>"Controller file was loaded but class does not exist". (Full stack at bottom)</p>
  
  <p>I am essentially trying to follow this tutorial: <a href="http://magento4u.wordpress.com/2009/06/08/create-new-module-helloworld-in-magento/" rel="noreferrer">Create new module “HelloWorld” – in Magento</a>.</p>
  
  <p>...though I am using my own company/class names etc. instead of "hello world"</p>
  
  <p>I am having trouble finding good documentation on Magento in general, and I am very new at it...</p>
  
  <p>can anyone provide some common causes, advice, or insight? I am swamped, googled this for hours, check permissions and file structure. You name it. </p>
  
  <pre><code>Trace:
  #0 /var/www/dev/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(306): Mage::exception('Mage_Core', 'Controller file...')
  #1 /var/www/dev/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(282): Mage_Core_Controller_Varien_Router_Standard-&gt;_inludeControllerClass('/var/www/dev_ml...', 'Foo_Wr...')
  #2 /var/www/dev/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(195): Mage_Core_Controller_Varien_Router_Standard-&gt;_validateControllerClassName('foo_Wr...', 'index')
  #3 /var/www/dev/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard-&gt;match(Object(Mage_Core_Controller_Request_Http))
  #4 /var/www/dev/app/Mage.php(459): Mage_Core_Controller_Varien_Front-&gt;dispatch()
  #5 /var/www/dev/index.php(65): Mage::run()
  #6 {main}
  </code></pre>