In this post, you’ll learn more about the Oracle ErrorNNF-00003: Naming adapter string does not exist with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
NNF-00003: Naming adapter string does not exist
Reason for the Error NNF-00003: Naming adapter string does not exist
Cause: The requested name service adapter was not found in the current adapter table.
How to fix the Error NNF-00003: Naming adapter string does not exist ?
You can fix this error in Oracle by following the below steps
Action: Check the spelling of the adapter reqested. Verify that the adapter runs on this platform, and the adapter is compiled into the adapter table linked into the executable.