In this post, you’ll learn more about the Oracle ErrorNNF-00004: Operation not supported in string with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
NNF-00004: Operation not supported in string
Reason for the Error NNF-00004: Operation not supported in string
Cause: The operation requested is not supported under this adapter.
How to fix the Error NNF-00004: Operation not supported in string ?
You can fix this error in Oracle by following the below steps
Action: Verify that the operation being performed is not under restriction, such as writing to read-only name service. For further details, turn on tracing and re-execute the failing operation. If the error persists, contact Worldwide Customer Support.