Problem solving Error Status Code 6 [NBU - Oracle]

Problem :
STATUS CODE 6: "The backup failed to back up the requested files"
The archive log file may have been deleted from the operating system and it does not exist at the specified location.

Reference :
http://seer.entsupport.symantec.com/docs/275089.htm

Resolution :

RMAN> Change Archivelog All Validate;
RMAN> Change Archivelog All Crosscheck;