Why are some sales orders not linked to their delivery orders?
I've configured the system as follows: Once a Sales Order is confirmed, a delivery order is generated. At this point, when viewing the Sales Order, there's a button to take you to the Delivery Order. Once the Delivery Order has been delivered, you can go back to the Sales Order. On the Sales Order, the button that takes you to the Delivery Order sometimes disappears. Most Sales Orders have it but some Sales Orders don't. Do you know of any variable that could explain this? What can I do so that this button is always present?