R2000i2 config.pro option documentation for: IGES_IN_DWG_LINE_FONT            

iges_in_dwg_line_font

yes, no

controls the import of user-defined line fonts. if set to yes, give default names to user-defined line styles without names in order (iges_1, iges_2etc.); otherwise, imports the user-defined line fonts as solid line font.