Hello,
I´m doing an Oracle upgrade from 11.2.0.4 to 12.1.0.2 in Windows Server 2012 (R2). I´m following the "Oracle Upgrade Guide" available in SAP Marketplace. At this moment I´m doing the "DBUA phase "4.5 Performing the Database Upgrade", but during the DBUA wizard in screen "Select Database" it show me the following error:
I´m doing this with a non <sid>adm user, I´m using the same user that I used to performing the installation of oracle database 11.2.0.4.
ORA-01017: invalid username/password; logon denied
This appears after I press "Next" in the screen:
I logged with <sid>adm user and I tried to connect to database (I always start the database instance with the <sid>adm) but now it returns the same error:
I read the SAP note 1576837 - ORA-01017: invalid username/password;
How can I solve this problem if I can´t connect to the database as sysdba? I don´t get it 
Can you tell me please, can you help me?
Thanks,
JD