How to fix the Oracle error ORA-12538: TNS:no such protocol adapter?

In this post, you’ll learn more about the Oracle ErrorORA-12538: TNS:no such protocol adapter with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12538: TNS:no such protocol adapter

Reason for the Error ORA-12538: TNS:no such protocol adapter

The protocol adapter requested (by way of the “(PROTOCOL=..)” keyword-value pair in a TNS address) is unknown. If the supplied address is typographically correct then the protocol adapter is not installed.

How to fix the Error ORA-12538: TNS:no such protocol adapter ?

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

Install the protocol adapter or correct typographically error, as appropriate. Note: if the supplied address was derived from resolving the service name, check the address in the appropriate file (TNSNAMES.ORA, LISTENER.ORA or SQLNET.ORA).