Any AI packages I make using the KeepAnEyeOn procedure don't work. When I move out of the NPC's sight the game crashes seconds later instead of the pursue interupt package starting. Does anyone know whats going on?

Never used this procedure, maybe is flawed, but could be that the observation area and/or the endpursuit areas are required. Could be that when you are out of range, that package tries to determine if your are out of limits or not and being uneble to determine it is enough to cause a CTD.

I have been using the players location as the observation area with a radius of 200. EndPursuitLocation is optional according to the wiki but I will set a value for it and see how it goes. Thanks for the insight.