Oracle Solution for Error ora-19882

ORA-19882: datafile string checkpoint string is ahead of space bitmap datafile string checkpoint string

What triggered the Error:

en checkpointing the datafile containing the space bitmaps for the datafile being backed up in order to use Unused Block Optimization, the checkpoint of the datafile containing the space bitmaps did not advance.

What should we do to fix it:

amine the trace and alert files for possible causes. Fix underlying problem to use Unused Block Optimization for datafile's backup.