Optix 6.0.0 failing with Failed to load OptiX library with driver 425.25

Hi,

I am running an Optix application on Windows Server 2016, using 4 x TeslaP100 GPU’s, running Nvidia driver 425.25, but get the error “Failed to load OptiX library.”

On my dev-PC I got the same error before upgrading to a newer driver version, but upgrading on the server does not remove the error for me.

Anything else that I might be doing wrong…? Thanks in advance for any help! (On my dev PC I have CUDA 9.2 installed - not sure that affects anything…?)

nvidia-smi output:
±----------------------------------------------------------------------------+
| NVIDIA-SMI 425.25 Driver Version: 425.25 CUDA Version: 10.1 |
|-------------------------------±---------------------±---------------------+
| GPU Name TCC/WDDM | Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Tesla P100-PCIE… TCC | 00000000:2D:00.0 Off | 0 |
| N/A 31C P0 25W / 250W | 0MiB / 16298MiB | 0% Default |
±------------------------------±---------------------±---------------------+
| 1 Tesla P100-PCIE… TCC | 00000000:31:00.0 Off | 0 |
| N/A 33C P0 31W / 250W | 1169MiB / 16298MiB | 8% Default |
±------------------------------±---------------------±---------------------+
| 2 Tesla P100-PCIE… TCC | 00000000:A9:00.0 Off | 0 |
| N/A 33C P0 24W / 250W | 1036MiB / 16298MiB | 0% Default |
±------------------------------±---------------------±---------------------+
| 3 Tesla P100-PCIE… TCC | 00000000:B5:00.0 Off | 0 |
| N/A 33C P0 24W / 250W | 1036MiB / 16298MiB | 0% Default |
±------------------------------±---------------------±---------------------+