Free goods across multiple items is not supported currently.
For example, if you have 2 items for 500 pc each with same material in the sales order as below. You are not getting any free goods determination when the condition says that the minimum quantity for this material is 1000 pc.
Item 10 | material TG11 | Qty 500
Item 20 | material TG11 | Qty 500
If you change the minimum quantity for this material to 500 pc and give for free 10 pc per every 500 pc. You can get below free goods determination.
Item 10 | material TG11 | Qty 500
Item 11 | material TG12 | Qty 10 (Free goods)
Item 20 | material TG11 | Qty 500
Item 21 | material TG12 | Qty 10 (Free goods)
