How to fix the Oracle error ORA-12601: TNS:information flags check failed?

In this post, you’ll learn more about the Oracle ErrorORA-12601: TNS:information flags check failed with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12601: TNS:information flags check failed

Reason for the Error ORA-12601: TNS:information flags check failed

The TNS information flags set by the process prior to connection negotiation were not present after the negotiation was finished.

How to fix the Error ORA-12601: TNS:information flags check failed ?

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

This is an internal error. Enable tracing and attempt to repeat the error. If it occurs again, contact Oracle Customer Support.