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rman connection

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
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bmkdubai
Asked:
bmkdubai
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1 Solution
 
OP_ZaharinCommented:
- 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> $rman target /
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bmkdubaiAuthor Commented:
rman target /     "ora-12638 credential retrieval failed"
sqlplus sys/password as sysdba   - is working
sql>$rman target /    
rman - 00571
rman-00569
rman-00571
rman-00554
rman-04005
ora-12638
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OP_ZaharinCommented:
- 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:
http://www.dbas-oracle.com/2011/05/ora-12638-credential-retrieval-failed.html
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