How to fix the Oracle error TNS-12155: TNS:received bad datatype in NSWMARKER packet?

In this post, you’ll learn more about the Oracle ErrorTNS-12155: TNS:received bad datatype in NSWMARKER packet with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12155: TNS:received bad datatype in NSWMARKER packet

Reason for the Error TNS-12155: TNS:received bad datatype in NSWMARKER packet

Cause: Internal error during break handling.

How to fix the Error TNS-12155: TNS:received bad datatype in NSWMARKER packet ?

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

Action: Not normally visible to the user. For further details, turn on tracing and reexecute the operation. If error persists, contact Worldwide Customer Support.