[Trigger] Creep Respawn System Condition - No One Around?

[madmuffin]

So I've read a bunch of tutorials on how to make creeps respawn, but I am having a problem with them as it makes them respawn absolutely no matter what every time, even if you have any units loitering around. If I have dead Ogre Lords next to a goldmine and I build my base there, I don't want the Ogre Lords to suddenly come back and start destroying my peasants. On the same note, if my base gets demolished or I move it and everyone clears out, I want the Ogre Lords to come back then and repopulate the place.

Is there any way to add a condition to the usual creep spawn system that does something like

If - A unit is within 512 of Dying Unit
Then - Don't Rez after X seconds.
Else - Rez after X seconds.

But have it keep checking to see if there is no one around that spot every X seconds or so, to see if its okay to respawn them yet or not?

 

[Marcelo Hossomi]

Use "Unit Group - Pick every unit in (unit group) ..." to check if there's no unit near that spot (make sure to use a condition so that it won't count neutral hostile/dead units)

 

[ap0calypse]

Remove the location and unit group leaks.
For the rest, Marcelo Hossomi is correct.