Saving the script works fin now :) However, I still have a problem, which is probably the intended behavior. Since my doors are bigger than a single tile (20x32) in order to open them completely and align them correctly with the walls, its seems they can be activated if the player is inside their "grid perimeter" even if the tiles he's standing on are set to "no interaction". Which means the player can close the door on himself, so the door overlaps with his model.
I suppose any big object with a part inside a tile on which the player is standing can be interacted with, even if the path between the player and the tile he's facing is set to "no interaction"? Or is it a bug?