I realized there is a typo of property name "radius" in circle entity. https://github.com/codelibs/libdxfrw/blob/e4a32e65e9afea811c26ebc7e931b0d533caac05/src/drw_entities.h#L319 https://github.com/search?l=&q=radious+repo%3Acodelibs%2Flibdxfrw&type=Code
I realized there is a typo of property name "radius" in circle entity.
libdxfrw/src/drw_entities.h
Line 319 in e4a32e6
https://github.com/search?l=&q=radious+repo%3Acodelibs%2Flibdxfrw&type=Code