We are using DBAPI for UOM conversion for different UOM's getting error?

Summary:

Hi team,

Basically my intention is whenever business create Purchase order with line level UOM as "Dozen" and for that item the primary UOM is "Each" in Item master. I want the conversion rate for that difference UOM's.

The below DBAPI for UOM conversion for different UOM's like PO line level UOM and Item Primary UOM.

Is there any in Oracle fusion cloud for the same?

Please let me know id anyone know this regard.

SELECT 

inv_convert.inv_um_convert_new ( 

                          item_id                   => 100000065508945

                         ,precision                => NULL  

                         ,from_quantity     => 1             

                         ,from_unit              =>'DOZ'

                         ,to_unit                    =>'Ea'

                         ,from_name           => NULL

                         ,to_name                 => NULL