ORA-16171: RECOVER...FINISH not allowed due to gap for thr string, seq string-string Cause: See alert log formore details Action: Copy missing archivedlogs from primary or another standby. Register
the logs and reissue the RECOVER...FINISH command. If the logs are not
available, issue the ALTER DATABASE RECOVER MANAGED STANDBY SKIP
command to ignore the standby redo log files.