I still need time to try with DOSbox.conf. If I have any solution in the DOSbox.conf, I will tell.
But I have primary solution for playing in EGA mode now. First, I have to create character in CGA mode. And save then load it in EGA mode.
This time I can play it in EGA without crashed when in town screen (don't sure that it will error again in other section or not...
).