Abacre.com

hello..
please i am trying to use the barcode but the problem is the ldn name. logical device name
where i can get the ldn name...
in the menu items when i try to read the code for the item it works
but when i go to the sale and read the item .. nothing happened..
when i try to put a device name ...

please can u add order id in the bill in version 1.8