error:[MemoryManagerGpu::releaseUnmappedMemoryFromInstance]700:Could not release device buffer

[super gnu]

Error as above, and render stops.

its an old (gpu) scene which rendered just fine on gpu before, in max 2018, and vray next..

ive reopened it to do an update, in max 2021/vray 5

it opened, and rendered ok, but missing some textures as i didnt have multitexture installed on 2021 (i used it for all the brick materials in original scene).

i downloaded multitexture and installed it for 2021..

now i get this error and it wont render.

whats up there?

[nikoleta.garkova]

Is it possible to send over the scene in question via our contact form so we can test? Make sure to mention this thread in the email, thanks!

[super gnu]

hi, i could not log on to the contact form (timeout error) so i sent a stripped scene via email to support@chaosgroup.com

as an update ive found that switching from bucket sampler to progressive fixes the problem (kind of, my machine shut itself down during the render, but i suspect thats my crusty old titan X gpus rather than this issue itself)

[IDO_3D]

I have the same issue with my GPU rendering. After reinstalling drivers few times to 461.72 on RTX 2080 Ti was stable for a while, but now render crashes after 3-4 frames of animation.

In other exterior scenes feels that there is the same problem after a few tryes of rendering.

Guys, what is happening? This month I have so many issues with VRay...

BTW. Max 2021, Vray 5, newest update..

[nikoleta.garkova]

Hey IDO_3D,

We'd really need to reproduce the issue to be able to troubleshoot, so best would be to forward a scene.

[trainofthought]

I'm getting the exact same error with a brand new GPU RTX A4000.

Started randomly today, have tried new drivers and upgrading to latest version, also banging my head against the wall as I have a deadline tomorrow, please help!!!

[Muhammed_Hamed]

trainofthought Try this build here,

https://nightlies.chaosgroup.com/#/v...e_5.1/20210727

This error was fixed a while back and I haven't been seeing it

[trainofthought]

Thanks for the help. This error went away for a while, but now seems to be back - especially when using Vray GPU RTX on the pair of Ampere cards I have. Have tried the latest build and recommended drivers, but this issue persist and seems to be something to do with Optix building kernels for the device. I do wish Vray GPU was more stable, particularly with multiple GPUs of varying configurations.

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i7 7700K, 64 GB, RTX A4000, RTX 3080Ti, Windows 10, Maya 2020.4