V-Ray RT CUDA Erorrs

V-Ray GPU V-Ray GPU :: Issues
1

Hi,

recently I am experiencing some errors with RT. It all started suddenly and now most of my scenes (which were working a few days ago) yield errors leading to vray.exe crashes.

Errors:

error: ./src/ocl_tracedevice.cpp(2046) : CUDA error 716

sometimes there is also CUDA error 999.

Geforce TITAN X on driver ver.: 352.86. V-Ray for Maya 2016, RT ver. 3.25.01

Thanks in advance!

2

Have you changed something in your system(hardware/software) recently?
Does the crash occur on every scene? Does it render with empty scene ?
Does it render when started from standalone (vray -sceneFile=“/path/to/vrscene” -rtengine=5 -numthreads=1 -verbose=4)?

3

There is a problem with the latest Nvidia driver version - 352.86 and our RT / Cuda engine stops working with an error 700 or 999.
You can set Environment variable VRAY_CUDA_DISABLE_PTX_OPTIMIZATION = 1 to get it working again or revert back to an older driver version.

4

Okay, it seems that the newest nVidia driver is causing that.
You have to downgrade to something older - like 350.12 (or you can just set the env var VRAY_CUDA_DISABLE_PTX_OPTIMIZATION=1 .. This would made the rendering about 5-15% slower though).
We’ve reported that and we’ll work to find a way to make that work …
edit : apperantly I was a bit too late :slight_smile:

5

Yes, now that you say it I remember updating the drivers a few days ago so I guess it is the driver’s fault. Should I go with the env variable untill the next V-Ray build shows up? Or untill the next Nvidia driver is released?

6

You can either go with the env (remember to restart Maya/Max/Vray) and wait for the next driver version, or you can install the previous nVidia driver (350.12).

7

All right, thank you very much!