Alive condition - triggers

[BulldozA 1]

So I'm making a mission where players must destroy a cache before they are able to move through a certain area, I have a trigger used to kill any player that enters the area.

So what I want to do is have the condition on the trigger set to see if that objective is still alive, I tried this

condition:
alive objectname

But that didn't work, what is the correct code to check if the cache is alive or not so the trigger will not kill players once the objective has been taken?

[sander 8]

Use getDammage and check whether is is less than 0.99. Ammunition crates will burst into flames when the damage reaches 1.

getDammage aCache < 0.99

Regards,

Sander