wildfire4 config.pro option documentation for: DXF_IN_PROXY_ENTITY            

dxf_in_proxy_entity

yes, no

controls the import of a dxf or dwg acad_proxy_entity. unix does not support proxy entity imports.

• yes—during a dxf or dwg file import, an acad_proxy_entity is also imported.

• no—proxy entities are ignored during dxf and dwg file import.