Error code
Oracle ORA-12514
ORACLEORA-12514
Database Error Code· An error code returned by a database server such as PostgreSQL or MySQL.
What it means
TNS listener does not currently know of service requested — service not registered.
How to fix it
- Verify the database instance is running and the service is registered with lsnrctl status.
- Confirm the service name in the connect string matches the actual service registered by the database.
- Restart the database instance so it re-registers its service with the listener.
Not affiliated with Oracle. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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