9uillo

That was it! Thanks so much for your help!

CE3_v1.2.3mf

I also noticed that if I rotate the object 180 degrees (i.e. upside-down) then it all works perfectly.

v1.2.obj

I have a solid object (made sure it is completely solid in Fusion360): When I slice it in Cura, the infill won't actually fill it. It leaves a cylindric empty area at the center of it: and all the top completely empty: I've tried with different infill patterns and densities to no avail. Ironically 100% leaves a perfectly empty area (see above), whilst 15% at least prints a tiny stick in the middle: Any ideas?