I've got it as dwg and convert to dxf with free dwgTodxf convertor.
It didn't fail. I want to read geometry information from 3DSOLID entity but can't find any description of proprietary data in groups 1
koo in n o
ll P/:1 [:,681 ^ 336>1<: ^ \VL ]*63;:- nm ^ \VL kqoo QK mk K7* U*3 mg ngenieoi moni