How to bring rollback tablespace online?

I tried to rename the datafile of some of the tablespaces. First, i take the tablespaces offline and that including the rollback tablespace as well.
After successfully rename the datafile of one of the tablespace, i tried to bring that tablespace back online, i get the following errors:

   SQLDBA> alter tablespace users online;

   ORA-00604: error occurred at recursive SQL level 1
   ORA-00376: file 4 cannot be read at this time
   ORA-01110: data file 4: 'ORA_TDDE_DISK4:[DBS]TDDE_RBS_1.DBF'

So, i thought i have to bring the rollback tablespace online first, but when i tried that i got the same error.
Is there anyway that i can bring rollback tablespace online again?

Patrick Huynh
patrick.huynh.pn_at_bhp.com.au Received on Wed Nov 20 1996 - 00:00:00 CET