Oracle Error Message
ORA-16171: RECOVER…FINISH not allowed due to gap for thr string, seq string-string
Reason for the Error
See alert log for more details
Solution
Copy missing archived logs 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.