Oracle Solution for Error ora-38748

ORA-38748: cannot flashback data file string - file is in use or recovery

What triggered the Error:

An attempt to do FLASHBACK DATABASE found that the file was not available for recovery. Either it was online and the database was open in some instance, or another process was currently doing media recovery or flashback on the file.

What should we do to fix it:

Do not do FLASHBACK DATABASE.