Ok. So now I've gotten the exporter to spit this out (which seems to be about the same as you suggested):

"C:\Program Files\Octane\octane.exe" -m RaceBoat_02 -r "C:\Users\Anders\Desktop\OctaneTest\RaceBoat_02.obj" --cam-pos-x 42.350042 --cam-pos-y 206.99491 --cam-pos-z -156.65632 --cam-target-x ...

I have the same problem. Octane works fine when exporting from C4D except when I check "Export Camera". When I try to export the camera, then Octane opens with this popup.

There was an error parsing the command-line arguments:

Couldn't find match for argument Argument: 0

USAGE:

dummy program ...