Backup is unable to open database file '%1'

Error constant SQLE_BACKUP_UNABLE_TO_OPEN_FILE
ODBC 2 State ERROR
ODBC 3 State ERROR
Parameter 1 Name of the file.
Severity 16
SQLCODE –1079
SQLSTATE WB017
Sybase error code 13435
Probable cause

The database file can not be opened by the backup. It may have been erased or otherwise corrupted.