ORA-21520: database server driver not installed



ORA-21520: database server driver not installed..

Answer / guest

Cause: User attempted to access a database server through an
object-mode OCI environment but the necessary driver for
supporting such access to the database server is not
installed or linked in.

Action: Check if the driver corresponding to the database
server has been installed/linked in and entered in the
server driver table.

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