return ingredients.blowgun.withDamage(max(0, ingredients.blowgun.damage - 5)); ????I fixed it, apparently one of the scripts I found online to repair tools was making MineTweaker ignore anything that came after it, here's the script that bugged things up:
http://pastebin.com/PAwpGtwe
It works, and doesn't break anything if it's in its own file
EDIT: Tested it and it only affects anything in the same file as itself
Minetweaker doesn't use return commands like that, nor does it use ingredients.anything - to my knowledge.
What are you trying to do here?