In this post, you’ll learn more about the Oracle ErrorTNS-12664: Services required by server not available on the client with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
TNS-12664: Services required by server not available on the client
Reason for the Error TNS-12664: Services required by server not available on the client
Cause: Service(s) that was (were) required by the server process were not available on the client process.
How to fix the Error TNS-12664: Services required by server not available on the client ?
You can fix this error in Oracle by following the below steps
Action: Configure the client with the services required by the server (best solution) or delete the requirement from the configuration file of the server (least secure).