Error [V-Ray] [MemoryManagerGpu::releaseUnmappedMemoryFromInstance] 700: Could not release device buffer

V-Ray for SketchUp V-Ray for SketchUp :: Issues
1

Hi,

I am currently trying to render a few images. Last week the same pictures worked fine. I had just made a new variant in sketch Up and adjusted the scenes accordingly (the position of the camera was not changed)
Now I either get this error message :
20.5.2025 11:23:55 Error [V-Ray] [MemoryManagerGpu::releaseUnmappedMemoryFromInstanc e] 700: Could not release device buffer

or the image is simply completely black after a very short rendering process.

What could be the reason? I’m not a pro with Vray yet, but so far my renders have worked.

Thank you very much​

2

Dear @melanie_fickers ​, hello.

Welcome to Chaos Forums!

I already answered you in the ticket.
The topic is similar to https://forums.chaos.com/forum/v-ray-rt-forums/v-ray-rt-problems/1232209-cuda-error-700-could-not-release-device-buffer
Please send the requested information and we will update the forum thread with the findings afterwards.

Best regards,
TS

3

Hi again, @melanie_fickers ​.

To sum up, I advised you to use RTX instead of CUDA while I am investigating the scene.

Now I have news - the error could be avoided after deleting Lamp Ceiling 001 copies. And you will be able to use CUDA.
But since there are a lot of them in your file, consider using RTX and I will keep you posted about the progress of the logged issue [VGPU-6826] in our bug tracking system.

Best regards,
TS

4

Hello.

I would like to inform you that the issue is fixed since V-Ray 7, update 2 (7.20.00).

Regards,
Ivelina