If your Inventory Control system has the Use Only Defined UOM option selected (on the Processing tab of the I/C Options screen), items can only use units of measure that exist on the I/C Units of Measure screen.
Therefore, assigning a unit of measure (UOM) to an item can involve two steps:
Note: If the Allow Fractional Quantities option is not selected (on the Processing tab of the I/C Options screen), the stocking unit is the smallest unit of measure used for shipping or selling the item.
To add a unit of measure to Inventory Control:
Inventory Control > I/C Setup > Units of Measure.
To add units of measure to an existing item:
Inventory Control > I/C Items and Price Lists > Items.
Print the I/C Item Status report to check the information entered for the item in the I/C Items screen.