Oracle Error Message
ORA-19603: cannot backup or copy active file with KEEP .. UNRECOVERABLE option
Reason for the Error
The user tried to copy or backup a file that was not closed cleanly, with KEEP .. UNRECOVERABLE option. This is not allowed because when restored, the file will require redo application before it is usable, and redo will not be saved because of KEEP .. UNRECOVERABLE option.
Solution
Take the tablespace offline cleanly, or close the database and retry the copy or backup.