You have to impliment the WEU custom script inorder to use it since it IS POSSIABLE to set unit max life in normal WE but WEU is an upgrade of GUI that links to advanced jass.
Your basicly trying to call a function that does not exist unless you add the custom script file and I am sure you know how to do that. . .
If not READ THE HELP AND HOW TO USE WEU MANUALS OR SOMETHING!
Also why are you posting this in the site discussion section since I think this has nothing to do with this site but more to do with the map section.
