Error: Invalid controller specified (index.html)

#0 C:\Program Files (x86)\Apache Software Foundation\Apache2.2\library\Zend\Controller\Front.php(934): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#1 C:\Program Files (x86)\Apache Software Foundation\Apache2.2\application\bootstrap.php(479): Zend_Controller_Front->dispatch()
#2 C:\Program Files (x86)\Apache Software Foundation\Apache2.2\htdocs\index.php(13): Bootstrap->runApp()
#3 {main}