Error : Not a valid {PRODUCTNAME.EN} format file (Type is: 1). (4284847)

Error: Not a valid {PRODUCTNAME.EN} format file (Type is: 1). You must select a valid {PRODUCTNAME.EN} file to append backups or use the @init option to delete the file.

In SQL Server, LiteSpeed logs and application event viewer messages, the error is accompanied by the below errors:

BackupMedium::ReportIoError: write failure on backup device 'VDI_CB45484F-7745-4580-BE4A-9F019E65485C_1'. Operating system error 1223(error not found).

BACKUP failed to complete the command BACKUP log [database_name] TO VIRTUAL_DEVICE='VDI_CB45484F-7745-4580-BE4A-9F019E65485C_0', VIRTUAL_DEVICE='VDI_CB45484F-7745-4580-BE4A-9F019E65485C_1', VIRTUAL_DEVICE='VDI_CB45484F-7745-4580-BE4A-9F019E65485C_2' withblock size=65536, stats=10,

The error is caused by the @format parameter specified for the backup process. If a value of 1 is specified for example, for which the option can't be met e.g. data can't be erased quickly from the media, the backup fails with a similar error to the above.

WORKAROUND: Specify a correct (existing) value for the @format parameter

Pushbacksystem cannot find the file specified.
{PRODUCTNAME.EN} could not open the Backup file: (D:BackupsPubs.bak).
The previous system message is the reason for the failure.

This is a similar kind of error but for restore process. In this case, a backup file was specified which does not exist.