Cuda device not recognized

[Cybergooch]

Something strange started happening earlier today, I'm not sure what changed, but the C4D plugin is not seeing my cuda device anymore.

In the octane Settings Panel | Devices there is nothing listed.
If I try to render I get:
-----
Started logging on 04.03.16 23:43:44

OctaneRender 2.25 (2250000)

CUDA error 999 on device -1: An unknown internal error occurred.
-> failed to initialise CUDA driver API
CUDA error 999 on device -1: An unknown internal error occurred.
-> failed to initialise CUDA driver API
Scene created in plugin version -1
There is no CUDA device which is supported by Octane Render...
Tried to access null node
Tried to access pin via an invalid ID P_MESH (111)
Tried to access null node pin
-----

Since I was having problems, I installed the latest nVidia drivers (362.00) but that didn't help.
This is in Windows 10 64 bit, C4D 15

I am able to render with stand-alone Octane, and it sees the cuda device fine.



Any idea what would cause this?