an exception occured while bootstraping the application

Action "actio" does not exist and was not trapped in __call()
Stack Trace:

 #0 C:\wamp\www\revange\library\Zend\Controller\Action.php(514): Zend_Controller_Action->__call('actioAction', Array)
#1 C:\wamp\www\revange\library\Zend\Controller\Dispatcher\Standard.php(288): Zend_Controller_Action->dispatch('actioAction')
#2 C:\wamp\www\revange\library\Zend\Controller\Front.php(945): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#3 C:\wamp\www\revange\library\Zend\Application\Bootstrap\Bootstrap.php(77): Zend_Controller_Front->dispatch()
#4 C:\wamp\www\revange\library\Zend\Application.php(328): Zend_Application_Bootstrap_Bootstrap->run()
#5 C:\wamp\www\revange\public\index.php(26): Zend_Application->run()
#6 {main}