What to do if some archivelog is missing

RMAN Backup error: What to do if some archivelog is missing or datafile is offline during RMAN backup?

RMAN> crosscheck archivelog all;

and then follwoing to delete expired archivelog.

RMAN> delete expired archive log;

Also refer to the skip inaccessible clause of the backup command. for example...

RMAN> backup archivelog all skip inaccessible delete input;
RMAN> change archivelog all validate;

because without it "skip inaccessible" will be needed any time You will start backup of archs.

Moreover, it can be done with following way also:

for the missing archive logs... u can do the following

connect target /
connect catalog rman/pwd@rmancatalog
run {
change archivelog from logseq = xxx until logseq =
yyy unavailable;
}

xxx and yyy are the logseg numbers, the one's you are missing.

RMAN> RUN
{
SET MAXCORRUPT FOR DATAFILE 1 TO 10;
BACKUP DATABASE
SKIP INACCESSIBLE
SKIP READONLY
SKIP OFFLINE;
}

To back up the database while skipping offline and read-only tablespaces, you can run the following command:

RMAN> BACKUP DATABASE
SKIP READONLY
SKIP OFFLINE;

Above discussion include other file types also if they are not available during backup and backup is generating exception.