Hello, I am a newbie and have been exploring inkscape. At this point I cant tell if I am missing something basic or if my install is broken.
My objective is to get a DXF file out of a TIFF for use in my CNC machine, for engraving.
I have loaded a TIFF and have been successful in some operations:
trace bitmap successfully makes a fit to the TIf file outline, (it is visible).
alt-ctrlC stroke to path done with the result the nodes are visible.
the "graphics" were highlighted or not highlighted. (selected or not for subsequent steps)

When I save as R14, I unchecked the use boxes and get :

File C:\Users\mark\Desktop\BALDORA-inkscape.dxf could not be saved. this message results from both the R14 and R12 formats.

I can successfully save to svg format.
I did look through and search for "could not save" in the forum, found comments on dxf compatibility.

note: on install in my Win 10, 64 bit system, I did not install the python section. Inkscape 0.92.1 r15371

Any advice will be appreciated.
thank you
mark

Please do install the python section, and try again. DXF export (and most extensions) depends on the python modules that come with Inkscape.