Fatal error: Uncaught exception 'MongoException' with message 'Invalid object ID' in /home/wwwroot/web/www.xctzb.gov.cn/application/core/MY_Model.php:34
Stack trace:
#0 /home/wwwroot/web/www.xctzb.gov.cn/application/core/MY_Model.php(34): MongoId->__construct('')
#1 /home/wwwroot/web/www.xctzb.gov.cn/application/controllers/download.php(17): MY_Model->find(Array, 1, 0)
#2 [internal function]: download->index()
#3 /home/wwwroot/web/www.xctzb.gov.cn/system/core/CodeIgniter.php(359): call_user_func_array(Array, Array)
#4 /home/wwwroot/web/www.xctzb.gov.cn/index.php(194): require_once('/home/wwwroot/w...')
#5 {main}
  thrown in /home/wwwroot/web/www.xctzb.gov.cn/application/core/MY_Model.php on line 34