When the return has a delivery as origin, the units used to carry out the default stock movement are those of the delivery. Thus if a delivery had as sales unit a Carton, but the associated stock movement in made by individual unit, the unit used by default to carry out the receipt to stock will be the unit.
It is possible to modify the conversion coefficient between the return unit and the stock unit.
If this change occurs not on the return line, but in the inventory detail window, the change in the coefficient is reflected on the return line, except in the following case: in the inventory detail window, other units are used or lines with different coefficients are entered and the quantity entered does not match the quantity of the return line. In this case the return line unit is replaced by the stock unit to ensure a conversion with the units used to carry out the receipt to stock.