500-Internal Server Error

无法加载控制器文件。文件"D:\web_root\erddm\app\protected\controllers\AController.php"不存在。 (D:\web_root\erddm\framework\base\CApplication.php:241)

Debug trace:

#0  require() called at [D:\web_root\erddm\framework\base\CApplication.php:683]
#1  CApplication->renderError() called at [D:\web_root\erddm\framework\base\CApplication.php:644]
#2  CApplication->displayException() called at [D:\web_root\erddm\framework\base\CApplication.php:556]
#3  CApplication->handleException()