Oracle Error Message
ORA-12315: database link type is invalid for the ALTER DATABASE statement
Reason for the Error
The database link name you specified on the ALTER DATABASE statement is not an ROM: link. You must specify an ROM: link when using the ALTER DATABASE statement to mount or open a secondary database.
Solution
Re-issue the ALTER DATABASE statement using a valid ROM: link to the database you want to mount or open. If a valid ROM: link does not exist, create one using the CREATE DATABASE LINK command. See the Trusted ORACLE RDBMS Guide to Security Features for more information about creating database links using the ROM: link type.
