I'm not sure if alembic format (that is used inside ORBX container) can support Octane's baking camera... I'll check it, and will add some workarounds if it is the case.
Regarding ORBX export: when you do it please make sure in Blender's output settings you've set the output path to the existing directory. I've just tried your scene - it exports without any problems when the output path is set correctly (except the baking camera is not exported, but as I said - I'll look into it when I'm back).
Baking in blender
Doesn't work at all for me. If I set export to Orbx or Alembic and run animate, I get .png files in the output directory that are black.
Win 7 64bit Ultimate SP1
Blender 2.78
4x GTX980 Ti
NVidia Driver 373.06
Octane Server 3.03.4 v.11.2
Octane SA 3.03.4
Dual Xeon E5-2686
64 GB Ram
1TB SSD
AsRock EP2C612 WS
Blender 2.78
4x GTX980 Ti
NVidia Driver 373.06
Octane Server 3.03.4 v.11.2
Octane SA 3.03.4
Dual Xeon E5-2686
64 GB Ram
1TB SSD
AsRock EP2C612 WS