1) The toughness setting does not work, Zomboid seems to lock the HP of the zombies once they are generated
2) If zombies become smart enough to open door with the cognition stat, they will remember how to open doors even if they become dumb again


1) What were you trying to make the zombie do? (eg. zombies become sprinters in the rain, zombies open doors at night, etc.)
2) Turn on "Enable Debug" on the "[DZ] Definitive Zombies" page (Singleplayers need a mod like "Change Sandbox Options" to turn it on)
3) Restart the server/game, this is so the changes can take effect.
4) Run the game for 10 in-game minutes(you can fast forward), this will print out a report into the log which I can use to debug.
5) Open and copy the text inside "C:\Users\<USER>\Zomboid\console.txt" or your zomboid save file location equivalent
6) Paste the text inside Git or Pastebin and send me the link.
7) Any red errors that appear and unsure if it is from the mod? Send them as well.