Problem with combining items

[MulleDK19]

Hello everyone,

I want to combine 2 items in my inventory and remove both of them in return for a new item.

I tried some code i found in the Maps/Main/inventory.HPS file, but I can't get it to work in my custom story. I can combine any two items I want, but I can only receive items that are combined in the main story (orb, hand drill, copper tube and needle).

Is there a way to receive other items like keys and oil?

Well, did you actually add a callback?