rman connection

Posted on 2011-10-22
Last Modified: 2012-05-12
dear experts
i have oracle 10.2.0. when i am typing connect target /  "ora-12638 credential retrieval failed" message appears. when i am conecting from sqlplus connect sys/system as sysdba is working.
please support
Question by:bmkdubai
    LVL 23

    Expert Comment

    - if you intended ro tun rman, you can do it from command prompt itself

    c:\> rman target /

    - or in sqlplus:

    sqlplus sys/password as sysdba
    sql> $rman target /

    Author Comment

    rman target /     "ora-12638 credential retrieval failed"
    sqlplus sys/password as sysdba   - is working
    sql>$rman target /    
    rman - 00571
    LVL 23

    Accepted Solution

    - is this on windows machine? are you running as the administrator on that machine? if not, when you choose command prompt> right on the shortcut and choose to run as administrator. then try again with rman target /

    - also from the following link, check the sqlnet.ora entry. make a backup of that file first before making any changes:

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