The unit of measure must be specified in the e-invoice. This is output as a code in the electronic invoice (XML file). The "Sales unit to code" mapping ensures that the sales unit of the item is translated into the correct codes without having to process all items individually.
If there is no sales unit, the mapping can use the sales content unit instead, provided the sales content is 0 or 1.
- Go to the
Configurations tab in the function bar and double-click on > 
Mappings > Sales unit to Code. 
Add more units as neded.- In the column From, enter the various notations of the sales units.
- Enter the appropriate "Code" in the column To .
Examples:
From To
Bottle XBO
Glass XCU
Litre LTR
Metre MTR
Note: The codes are defined in UN/ECE Recommendation No. 20 "Codes for Units of Measure Used in International Trade". LINK https://unece.org/trade/documents/session-documents/codes-units-measure-used-international-trade-recommendation 
Save and close the mapping
Important: The line with the asterisk (*) as a placeholder for missing values must always remain the last line. Insert new entries above this line.
Administrator Manual
- Creating item groups
- Creating an item group package
- Setting up ESC events
- Setting tax rates
- Setting up image optimisation
- Configuring the Bp Event web server
- Creating public holidays in the Holidays/Special events calendar (Versions prior to 12.1R12)
- Setting up change notifications
- Setting up e-invoicing
- Importing public holidays/special events
- Setting up emails
- Creating time slots
- Changing picklists
