Below command won't work as expected and it will include all the archive available while backing up of domain,
backup -s D:/Domain_bck_642 domain Domain642 -naUse -na/no archives options in a command while executing it through bwadmin :Use below command to take the backup of domain excluding the application archives,
backup -na -s D:/Domain_bck_642 domain Domain642
backup -s D:/Domain_bck -na -z domain Domain642
Here, -na : no archives -z : zipped file
[NOTE : All above argument should be used before entity name.]