Capture error " Failed to save log listing for spthread 2 " and " ORA-12801 " (4321236)

Capture stopped and event_log has following entries

Error 2011-08-05 05:55:07.718729 6848520 1 Capture stopped: Internal error encountered; cannot continue (capturing from YYYY)
Error 2011-08-05 05:55:07.708148 6848520 1 Capture: Failed to save log listing for spthread 2 (capturing from YYYY) [module oct]
Error 2011-08-05 05:55:07.694964 6848520 1 Capture: 12119 - OCIStmtExecute failed with ORA-12801. (capturing from YYYY) [module osp]

One of the instance in the RAC is down (INACTIVE)

Bring up the instance that is down and start capture.