creo4 config.pro option documentation for: CROSS_SECTION_OUTLINE_REFIT 
(hidden)
dxf_in_proxy_entity
yes
*
, no
Controls the import of a DXF or DWG ACAD_PROXY_ENTITY.
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.