I don't think my first post was posted because of my new account so here's my comment again.
I get an error when I as a half-kin wolf have a child with an elf. I am unable to select the child in the residents window normally. Additionally, when I can select the child it gives me the following inspect window.
Edit: The same problem also occurred when I tested as a Human male with elf female.
I have the same problem. I cant play with my own childs, I have to sell them all at the moment. Reinstalled everything and I am playing on a new save file.
Here the corosponding datas from the save file.
First one is one of my normal slaves:
"340":{"children":[],"father":-1,"halfsiblings":[],"id":"340","mother":-1,"name":"Carrie Sagespirit","race":"Dark Elf","sex":"female","siblings":[],"state":"enslaved"}
this is one of my daughters. I sold her because she wasn't working:
"481":{"children":[],"father":"3","halfsiblings":[],"id":"481","mother":"285","name":"Torbanise Pendragon","race":"Elf","sex":"female","siblings":["957","379"],"state":"left"}
I hope this helps some one to help us xD. thx for helping. ^^
I encountered this problem too. I was able to solve it by changing the "race_display" of any bred slaves in my savefile from "Mixed" to something else (in my case i have only tried setting to Dragonkin). So it seems to encounter some kind of error when trying to display a Mixed race character, which so far only can exist from the players breeding.
