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

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

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

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

Internal error during break handling.

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

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

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