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

In this post, you’ll learn more about the Oracle ErrorTNS-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

TNS-12601: TNS:information flags check failed

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

Cause: 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 TNS-12601: TNS:information flags check failed ?

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

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