Anyone has faced this error, even though we are Administrator and part of ORA_DBA then as well suddenly unable to retrieve credential:
<C:Documents and Settingsskumar>sqlplus> "/as sysdba"
SQL*Plus: Release 188.8.131.52.0 - Production on Thu Jun 4 08:30:22 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
ERROR: ORA-12638: Credential retrieval failed
Kindly assist here.
Thanks in advance.