Originally Posted by cohadar
Just create a simple GUI trigger that has some event that convert it to jass to see how it should look.
Since he is using damage event responses, I presume he is adding specific unit events to the trigger from somewhere else, or is passing it to a damage detection system.
I would recommend adding debug messages to the trigger. Restore it to its original state when it still worked and then make sure you are changing only one thing at a time and testing it after each change to help identify where it breaks down.