Force Remove Unit from Training Queue?

[Spellbound]

I've been trying to limit unit training per production building ([ulr=https://www.hiveworkshop.com/threads/limit-number-units-per-building.279537/post-2830247]This Thread[/url]) and the initial solution is to order the production building to cancel. This doesn't seem to work, however, so I was wondering if anyone has ever discovered a way or some sort of loophole to remove a unit from a build queue?