Hello, I found that we can not use "_" for character name.
It is good to use underscore for character name.
Because I name characer with _AAAA, _AAAB, _AAAC, ... instead of number.
For example RING_AAAA, RING_AAAB, RING_AAAC, ...
They are warehouse character and they stock ring or amulet.
I want to rename existing many character name.
I'll update it!