While opening the database , if you are getting below ORA-0600 error

ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr]

metalink – 1296264.1

Problem:

Solution:

1. start the database in mount stage:

2. Get controlfile and redo file location:

3. shutdown the database and take physical backup of controlfile

4. startup mount

5. Recover the database by applying current logfile: