Cause
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.
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.
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.
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12300.htm
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e12300.htm
http://docs.oracle.com/cd/E16655_01/server.121/e26079/toc.htm
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