protected function showErrorMessage($message, $file, $line, $trace, $errorcode)
 {
     parent::showErrorMessage($message, $file, $line, $trace, $errorcode);
     if (!empty($this->_config[$this->_appName]['errorDir'])) {
         $errDir = $this->_config[$this->_appName]['errorDir'];
     } else {
         $errDir = 'WIND:web.view';
     }
     $errDir = Wind::getRealPath($errDir, false);
     if (is_file($errDir . '/' . $errorcode . '.htm')) {
         $this->_errPage = $errorcode;
     }
     ob_start();
     require $errDir . '/' . $this->_errPage . '.htm';
     exit(ob_get_clean());
 }