Oracle : Ошибка ORA-12336


"cannot login to database (link name %s) "
*Cause: You are tyring to login while another user is mounting or
dismounting the same database.
*Action: Check to see if the database is in the middle of being
mounted or opened and try your login again once the database is
accessible.

Попробовать перевести


Поискать эту ошибку на форуме