[mike0804]

I used to put an empty table "{}" indexed to 402 so it's like

[402] = {},

UPDATES: I just find out that this might not be a specific problem for my Azys lla case. I use navTest mode and try to reach The Churning Mist from different places and get the same error message. Churning Mist is map 400, which is already written in nav data.

Idyllshire -> The churning mist (OK)
Western Thanalan -> The churning mist (ERROR)
Central Thanalan -> The churning mist (ERROR)

Wester Thanalan -> Idyllshire (ERROR)
Gridania -> Idyllshire (ERROR)

Seems like the way to find path is doing something wrong?

UPDATES2: However, you can do it reversely.
Idyllshire -> Wester Thanalan (OK)
Idyllshire -> Gridania (OK)