How to fix the Oracle error ORA-21520: database server driver not installed?

In this post, you’ll learn more about the Oracle ErrorORA-21520: database server driver not installed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-21520: database server driver not installed

Reason for the Error ORA-21520: database server driver not installed

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.

How to fix the Error ORA-21520: database server driver not installed ?

You can fix this error in Oracle by following the below steps

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