Do you have the (.002, .003, etc.) for this specific archive, or are you trying to create a split file yourself?
: This file only contains a portion of the total data. You cannot extract it successfully unless you have all the other numbered parts in the same folder. CFG.7z.001
: If you see a config.txt or CFG file associated with a 7z archive, it often controls "deep" installation features, such as parameter forwarding, silent installation, or running specific programs automatically after extraction. Do you have the (