#file addons/account/account_move_line, line 436
-- 'quantity': fields.float('Quantity', digits=(16,2), help="The optional quantity expressed by this line, eg: number of product sold. The quantity is not a legal requirement but is very useful for some reports."),
++ 'quantity': fields.float('Quantity', digits_compute=dp.get_precision('Product Unit of Measure'), help="The optional quantity expressed by this line, eg: number of product sold. The quantity is not a legal requirement but is very useful for some reports."),