d.get_map_index() The value is returning zero

Good Evening, I'm trying to create a quest where I try to use the command d.spawn_mob more is not working because I'm on the map d.get_map_index () just returns zero, the index does not correct the map.

You first need to mark it as a Dungeon so you have to teleport to a "Dungeon" d.warp or something like that.

How do I mark as dungeon?

d.join(mapindex)
or
d.new_jump_all(mapindex,x,y)

using d.new_jump_all could not, only with more d.join'm teleported to the middle of the map on a vacant