Cannot change pokemon's nature

[Alexk0111]

I built the code just about an hour ago. I was using the app. I suddenly realized that I couldn't change the nature of the pokemon I edit. Plz help!

[kwsch]

I'm assuming you're trying to edit a Gen3/4 save file.

In those games, Pokémon natures are derived from the PID. In the desktop PKHeX program, changing the Nature drop-down modifies the PID automatically; in this program, it's not as sophisticated.