Karl,
Not sure what you are trying to add manually (hopefully not the scalar device - won’t work). What device are you trying to add (tv, bluray, etc)? Depending on the device - the command map file will be a file that lists the available commands that can be sent to the device (example of the setting: “sonytv-commands.map” - will create that file under your maps directory).
Again - don’t even try to use scalar as a manually added device either - there just is nothing behind it right now. If you do have a TV - turn on simple ip (on my tv: settings->network->home network->ip control->simple ip) and try to discover that service.
Tim