explained your OCS and SKP behaved perfectly - as I would expect.
Your OCS DID have something wrong with it [?] BUT if I reloaded the very same OBJ file it was then fine on my set up.
Therefore I must suspect there is something wrong with your 'Octane' preferences...
The exporter works fine for me [and many others], so I am forced to conclude that the problem is with your
set up - especially when I can get a good result from the very same files you have supply ???
Have you check for the correct access rights to all of the folders and their files involved ?
Why would your supplied OCS not render anything on your PC BUT when it's on mine work fine with the same file[s] ???
I am not privy to your PC's set up.
Are you an admin?
Do the folders involved in this have rights that let you read/write files etc etc ??????