ORA-00296: maximum number of files (string) exceeded for RECOVER DATAFILE LIST
What triggered the Error:
The RECOVER DATAFILE LIST command specified more datafiles than are allowed by the DB_FILES initialization parameter. This error occurs when doing recovery with Recovery Manager, and the instance has been started with a DB_FILES parameter specifying fewer datafiles than recovery manager needs to recover to satisfy the user's RECOVER command.What should we do to fix it:
Re-start the instance with a higher value for DB_FILES.
If this was not sufficient go over to:
Oracle Official Support Knowledge Center
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Or maybe those geeks at: StackOverflow Board