OpenRA

I have a unit that acquires a condition when picking up my custom crate. I want this condition to be revoked after the unit uses one of its specific weapons to attack once. How to do this? Here's the specific situation: I designed an infantry unit that, upon picking up a crate, gains condition P1, w...

A weapon where soldiers designate the target and another unit attacks it. This weapon can only be used once, and to use it again, you need to spend money. How can this be achieved?

The code did not work:

^Building:
AcceptsDeliveredCash:
ValidRelationships: Enemy, Neutral, Ally