How to fix the Oracle error ORA-06127: NETTCP: unable to change username?

In this post, you’ll learn more about the Oracle ErrorORA-06127: NETTCP: unable to change username with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-06127: NETTCP: unable to change username

Reason for the Error ORA-06127: NETTCP: unable to change username

The host’s SQL*Net TCP/IP server could not establish a PROXY LOGIN connection because the client username is unknown (to the host OS).

How to fix the Error ORA-06127: NETTCP: unable to change username ?

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

Create new user account on host.