I did everything you told me : Yes, I'm in PO line order

I erased the space after the coma. I still get the same error message.

I removed product_qty for Dependencies then I still get the same kind of message " Unknown field 'qty_received' in dependency 'qty_received'"

Hello,

1. open studio in PO form view -> navigate to purchase order lines and open list view

2. drag and drop field with type decimal -> then click on "More" at the left bottom

3. add this code on compute field:

for record in self:
record['x_studio_remaining_qty'] = record['product_qty'] - record['qty_received']

the result will be :

Notes:

- activate developer mode

- start new purchase cycle to test customizations

Hope this will Help