How to import dxf to Inventor :)

Hello everyone,
I'd like to know how to import a DXF format file to Autodesk Inventor sheet metal environment sketch. Then, I have to do some minor dimensions changes and face it to default thickness.
When I import dxf ( Open > cad file ) ,inventor open it as drawing. Then, I copy from drawing sketch what I need to duplicate to a new part sketch.
when I face the copied sketch the sketch doctor show up and disable facing process
any idea, i did my best and i couldn't solve this issue.
2 Answers

The first thing I would change is the copying - you can import the dxf directly into the sketch ("Insert" - "ACAD" and switch the file type to dxf).
In the Import-Options check the "Constrain End Points" option and import the geometry.
A few coincident constraints have to be added manually.
Attached is a file in IV 2014 format

Hello every body
Please, I would like to ask about the same problem with some differences, I can't import the file DXF (this file was converted from cinema 4d to DXF file) into Inventor fusion 2012.
I have imported the file DXF into Autocad and I save this last one under file.dwg, after that, it doesn't open in Inventor.
Thank you very mutch