ORA-12324

Error: ORA-12324: cannot use the ROM: link type on a private database link

Causa: You can only specify the ROM: link type on a public, not a private, database link.

Acción: Determine if there is an existing public database link to the secondary database. If not, and if you wish to establish public access to the secondary database, create a public database link to the secondary database using the CREATE DATABASE LINK command.