Locations outside playable map area

Ok, it has been written that setting a unit location outside the playable map area crashes the map.

My question is:
Is it setting the value of the location that crashes the map?
Or is it setting the location of the unit that crashes the map?

Why do I ask?

I have a need for a function to return 2 real values. I'd like to use a location pointer to do this, just wondering if I'm going to come accross issues with high values.

The reals of a location can be anything you like. It's the unit part that causes the crash.

Sweet as

Thanks.

You can, however, move a unit into the boundry using triggers.