Crash when trying to use GPS distance

Can anyone see something that would cause the bot to crash with this code? (cause it does...)

Code:

---

GpsPoint point = this.gps.GetPoint("Test");

if (me.dist(point.x, point.y, point.z) > 500)

{

Log("Test is more then 500 away");

}

---

Crash when trying to use GPS distance