How to add child table records from main table form?

Dear community,

I have an app with purchases and sales. When i create sales order, i can see order details and click to add. See picture 1. However the same thing i cannot do for purchase orders. See picture 2. I checked columns etc. they have the same set up. Details in both table are List column type and connected with Ref_Rows function. After saving header info for purchases, i can see add function. see picture 3.

Anyone can suggest what to do?

The “ADD” on the 1st picture is due to relation between Order Table and Order Detail Table sets with IsPartOf = ON.

However, A table can only have one Ref column marked IsAPartOf (a row can only be a part of one other row).


Thank you very much. I missed this function obviously.