No cloud here, just saving to a local folder on the C:\ drive. I’ve already exported an FBX to the same folder - which worked, but I didn’t like how the FBX didn’t keep my layers when imported into Blender, so wanted to try the trusty old OBJ.
Tried to export one single surface but get the same error.
It was modelled in another bit of software but I can’t imagine that would affect an export?
I also downloaded the latest Rhino6 build but got the same error.
I could send the model if needed, so long as you keep it under your hat!