ORA-12318 database (link name string) is already mounted
March 20th, 2009
Description:
ORA-12318 database (link name string) is already mounted
Cause:
You are attempting to mount a secondary database that has already been mounted by your instance.
The database is already mounted, so you need not take additional action to mount it. To establish access, use the
ALTER DATABASElinknameOPENstatement to open the database.