i have createrd a UDF on the Item master data and i have also ceated 2UDF's on the delivery note.
I have created a FMS with a query that updates the UDF(Opening Readings) with the value from Item Master data.
Now for me to achieve the second UDF on Delivery i want a query that will subtract the Opening readings UDF from Quantity entered.
I want the subtraction to happen immediately the quantity is changed.
Attached is the images for your assistance
Urgent help will be appreciated