If a player researches an upgrade, I'd like to raise the level of a non-hero ability. The unit with the ability is the Necromancer, the spell is called Amplify Damage.
Use one of the actual upgrades in the map. Go to the object editor, then click on the upgrade tab. I usually use skeletal mastery. In 'Data Affect 1 - Ability Effected' select the ability that you want to level up.
Then in the trigger editor, do something like...
Trigger:
Unit Upgrade
Events
Unit - A unit Finishes an upgrade
Conditions
(Researched tech-type) Equal to Iron Plating (Global Upgrade)
Actions
Player - Set the current research level of Creep Armor (Latent Upgrade) to (Execution count of (This trigger)) for (Picked player)
Of course, change Iron Plating to whatever your upgrade is. Then each time this upgrade is researched, your ability will be leveled up once.
Which is exactly what I just explained. I added the trigger part to explain how it can be done in any situation. i.e. change "player finishes an upgrade" to "game time -10 minutes" or "a unit dies" or whatever he wants it to be.
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.