The error message "c:\build\tpf2_steam\src\lib\ui\combobox.cpp:174: void __cdecl UI::ComboBox::SetSelected(int,bool): Assertion `index < (int)m_createItemFns.size()' failed."
occurs if duplicate keys are used.

They shouldn't do this. If that's standard for you, i can't tell you why, but keys 'o' and 'p' are used to tilt certain objects.

So I have a slight problem with the buildings, and that is that they're tilting at abound a 20 degree angle and i can't rotate them. Do you know how i can fix this?

Ok. I don't think there's much i can do about this, because it looks like an error in a source file, which could be a bug in the game code, or a conflict with another mod.
I'm really not sure. I'm not getting any crashes with this mod.

Things you can try is to validate your game files, redownload this mod, or try activating only this mod and see if the crash still occurs.

I Have the same :
c:\build\tpf2_steam\src\lib\ui\combobox.cpp:174: void __cdecl UI::ComboBox::SetSelected(int,bool): Assertion `index < (int)m_createItemFns.size()' failed.
It happen if I click the UI Button of this mod

Hi. That's interesting, but i can't replicate this crash on my end.
This message doesn't look like it's related to this mod to me.
I'd say '../../src/Lib/UI/ComboBox.cpp:174' points to some error in a source file, but i'm not editing any source files.
You could try to redownload the mod and see if that helps, if you're interested.

Hi,
selecting "Asset Plopper" in the assets-menu caused instant crash:
../../src/Lib/UI/ComboBox.cpp:174: void UI::ComboBox::SetSelected(int, bool): Assertion `index < (int)m_createItemFns.size()' failed.
No other related messages in the standard output.