Warning: Invalid argument supplied for foreach() - JoomFish

Warning: Invalid argument supplied for foreach() in

/libraries/joomla/database/database/mysql.php on line 375

вот код
foreach ($fields as $field)
         {
            $result[$field->Field] = preg_replace("/[(0-9)]/", '', $field->Type);
         }

никак не разберусь
помогите пожалуйста