Oracle Error Message
RMAN-06054: media recovery requesting unknown archived log for thread string with sequence string and starting SCN of string
Reason for the Error
Media recovery is requesting a log whose existence is not recorded in the recovery catalog or target database control file.
Solution
If a copy of the log is available, then add it to the recovery catalog and/or control file via a CATALOG command and then retry the RECOVER command. If not, then a point-in-time recovery up to the missing log is the only alternative and database can be opened using ALTER DATABASE OPEN RESETLOGS command.
