Get ORA-12638 Error when Connecting via SQL*Plus Using NTS authentication (Doc ID 273665.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.4 and later
Information in this document applies to any platform.
***Checked for relevance on 01-Aug-2016***

Symptoms

ORA-12638 when connecting via SQL*PLUS using TNSNAMES resolution with SQLNET.AUTHENTICATION_SERVICES=(NTS) set in the SQLNET.ORA file.

Cause

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