help with Magento: Controller file was loaded but class does not exist

Question

Hi-

I am having trouble getting around this error in Magento:

"Controller file was loaded but class does not exist". (Full stack at bottom)

I am essentially trying to follow this tutorial: http://bit.ly/aBjuOv

...though I am using my own company/class names etc. instead of "hello world"

I am having trouble finding good documentation on Magento in general, and I am very new at it...

can anyone provide some common causes, advice, or insight? I am swamped, googled this for hours, check permissions and file structure. You name it.

Thanks.

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->_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->_validateControllerClassName('foo_Wr...', 'index')
#3 /var/www/dev/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#4 /var/www/dev/app/Mage.php(459): Mage_Core_Controller_Varien_Front->dispatch()
#5 /var/www/dev/index.php(65): Mage::run()
#6 {main}

Answer 1

that error means that magento found a file for your controller where it expected to (app/code/local/Namespace/Module/controllers/FooController.php) but that the class inside didn't have the name it expected (it wasn't Namespace_Module_FooController).