Missing lines in DXF export

[info]

I'm trying to export a dxf of a sketch.   Here is my sketch:

When I open it in Inkscape, there are some lines missing.   It looks like:

I've tried many different things, but my exported dxf is always missing the same lines in the gear outline.

I've done this export dxf to InkScape workflow many many times, and this is the first time I see missing lines.  

Does anyone have any idea what's going on, or a workaround?

Thanks.

[HughesTooling]

Can you attach the DXF file. Some programs have trouble reading splines from Fusion, you might be able to use QCad then save as SVG.

[info]

Thank you.

Here is the DXF

[HughesTooling]

Unless you have same other CAD software that can convert the DXF splines I think your only option is to use this APP to save the DXF splines converted to line segments.

Mark

[info]

I was able to use QCAD to open the DXF, save it as an SVG and then open it in InkScape.   The lines were properly there.

But has anything changed recently in Fusion 360's dxf export feature?    As I said, I've done this many many times and this is the first time I get missing lines.   And I've been exporting the same kind of sketches (gears with different sizes), and they have always been ok.   Why does this one suddenly have a spline that InkScape can't read?

Thanks.

[info6F76J]

I am using inkscape to create laser cut paths but was also missing parts of the sketch.  Using the above app to first export as a dxf file I then opened that file into fusion then saved the sketch as a dxf.  This finally allowed me to see the full sketch in inkscape.  I cant say if the app helped, it may work by saving the sketch again after opening it back into fusion.  Regardless I can see the full sketch and got my project done, hope this helps someone.