Hello, I have a scene I work on in Maya 2020 and Arnold 5.0 GPU. Yesterday everything worked fine while I was lookdeving the scene until some point when I suddenly got GPU fatal error, please restart application. It happened without me adding any new texture or tweaking the render samples. Just like that. So this morning when I opened it again, I am unable to render anymore, because after few iterations (meaning rendering actually starts) it will say Render Aborted. My console displays this:

00:00:02 900MB | log started Wed Nov 10 08:15:06 2021

00:00:02 900MB | Arnold 7.0.0.0 [47ab20b9] windows clang-10.0.1 oiio-2.3.2 osl-1.12.0 vdb-7.1.1 clm-2.0.0.235 rlm-14.1.3 optix-6.6.0 2021/10/07 01:16:30

00:00:02 900MB | 1 x Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz (8 cores, 16 logical) with 65337MB

00:00:02 900MB | NVIDIA driver version 472.39 (Optix 60801)

00:00:02 900MB | GPU 0: NVIDIA GeForce RTX 2080 @ 1710MHz (compute 7.5) with 8192MB (7157MB available) (NVLink:0)

00:00:02 900MB | Windows 10 (version 10.0, build 19042)

00:00:02 900MB | soft limit for open files changed from 512 to 2048

00:00:02 900MB |

00:00:02 900MB | [color_manager_ocio] default ocio.config found in C:\Program Files\Autodesk\Arnold\maya2020\bin\..\ocio\configs\arnold\config.ocio

00:00:02 900MB | loading plugins from C:\Program Files\Autodesk\Arnold\maya2020\bin\..\plugins ...

00:00:02 901MB | alembic_proc.dll: alembic uses Arnold 7.0.0.0

00:00:02 901MB | cryptomatte.dll: cryptomatte uses Arnold 7.0.0.0

00:00:02 901MB | cryptomatte.dll: cryptomatte_filter uses Arnold 7.0.0.0

00:00:02 901MB | cryptomatte.dll: cryptomatte_manifest_driver uses Arnold 7.0.0.0

00:00:02 901MB | synColor_shaders.dll: color_manager_syncolor uses Arnold 7.0.0.0

00:00:03 925MB | usd_proc.dll: usd uses Arnold 7.0.0.0

00:00:03 925MB | loaded 6 plugins from 4 lib(s) in 0:00.14

00:02:43 11643MB WARNING | unable to create log file C:/Users/adria/Desktop/log.1.*: Invalid argument

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_00_LOD2/Aset_stone_rough_S_ufllcisva_00_LOD2Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_01_LOD2/Aset_stone_rough_S_ufllcisva_01_LOD2Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_00_LOD1/Aset_nature_rock_S_vbuxda0iw_00_LOD1Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_03_LOD2/Aset_stone_rough_S_ufllcisva_03_LOD2Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD1/Aset_nature_rock_S_vbuxda0iw_02_LOD1Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_00_LOD3/Aset_stone_rough_S_ufllcisva_00_LOD3Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_01_LOD3/Aset_stone_rough_S_ufllcisva_01_LOD3Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_03_LOD3/Aset_stone_rough_S_ufllcisva_03_LOD3Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_00_LOD2/Aset_nature_rock_S_vbuxda0iw_00_LOD2Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD2/Aset_nature_rock_S_vbuxda0iw_02_LOD2Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_00_LOD4/Aset_stone_rough_S_ufllcisva_00_LOD4Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_01_LOD4/Aset_stone_rough_S_ufllcisva_01_LOD4Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_00_LOD3/Aset_nature_rock_S_vbuxda0iw_00_LOD3Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_03_LOD4/Aset_stone_rough_S_ufllcisva_03_LOD4Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_00_LOD5/Aset_stone_rough_S_ufllcisva_00_LOD5Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD3/Aset_nature_rock_S_vbuxda0iw_02_LOD3Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_01_LOD5/Aset_stone_rough_S_ufllcisva_01_LOD5Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_03_LOD5/Aset_stone_rough_S_ufllcisva_03_LOD5Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_00_LOD4/Aset_nature_rock_S_vbuxda0iw_00_LOD4Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD4/Aset_nature_rock_S_vbuxda0iw_02_LOD4Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD5/Aset_nature_rock_S_vbuxda0iw_02_LOD5Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_00_LOD6/Aset_stone_rough_S_ufllcisva_00_LOD6Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_01_LOD6/Aset_stone_rough_S_ufllcisva_01_LOD6Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_00_LOD5/Aset_nature_rock_S_vbuxda0iw_00_LOD5Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_stone_rough_S_ufllcisva_03_LOD6/Aset_stone_rough_S_ufllcisva_03_LOD6Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

ERROR | [polymesh] /PROPS/group29/Aset_nature_rock_S_vbuxda0iw_02_LOD6/Aset_nature_rock_S_vbuxda0iw_02_LOD6Shape: incorrectly defined UV coordinates, missing either uvlist or uvidxs

00:02:59 15397MB | [color_manager] using color manager of type "color_manager_syncolor"

00:02:59 15397MB | [color_manager] rendering color space is "scene-linear Rec 709/sRGB" with declared chromaticities:

00:02:59 15397MB | r(0.6400, 0.3300) g(0.3000, 0.6000) b(0.1500, 0.0600) and w(0.3127, 0.3290)

00:02:59 15399MB |

00:02:59 15399MB | rendering image at 1920 x 817, 5 AA samples

00:02:59 15399MB | AA samples max 50

00:02:59 15399MB | AA adaptive threshold 0.03

00:02:59 15399MB | AA sample clamp <disabled>

00:02:59 15399MB | diffuse samples 2 / depth 1

00:02:59 15399MB | specular samples 2 / depth 1

00:02:59 15399MB | transmission samples 2 / depth 1

00:02:59 15399MB | volume indirect samples 2 / depth 1

00:02:59 15399MB | total depth 10

00:02:59 15399MB | bssrdf samples 2

00:02:59 15399MB | transparency depth 10

00:02:59 15399MB | node initialization done in 0:00.00 (multithreaded)

00:02:59 15399MB | updating 2314 nodes ...

00:02:59 15399MB | node update done in 0:00.00 (multithreaded)

00:02:59 15399MB | [gpu] GPU update done in 0:00.000

00:02:59 15399MB | [aov] parsing 2 output statements ...

00:02:59 15399MB | [aov] registered driver: "arv_display" (driver_arv)

00:02:59 15399MB | [aov] * "RGBA" of type RGBA filtered by "defaultArnoldFilter/gaussian_filter" (gaussian_filter)

00:02:59 15399MB | [aov] * "object" of type NODE filtered by "_renderViewDefault/closest_filter" (closest_filter)

00:02:59 15399MB | [aov] done preparing 4 AOVs for 2 outputs to 1 driver (0 deep AOVs)

00:02:59 15283MB | starting render ...

00:02:59 15283MB | [gpu] building scene and compiling shaders ...

00:02:59 15283MB | [gpu] building scene and compiling shaders done in 0:00.000

00:03:00 15436MB | 0% done -- estimated remaining time = 3740.0s

00:03:02 15508MB ERROR | [gpu] an error happened during rendering. OptiX error is: Unknown error (Details: Function "_rtContextLaunch2D" caught exception: Encountered a CUDA error: cudaDriver().CuEventSynchronize( m_event ) returned (700): Illegal address, file: <internal>, line: 0)

GPU 0 had 7157MB free before rendering started and 312MB free when crash occurred

GPU errors are sometimes due to a GPU not having enough remaining free memory. To see if this is what happened here, try simplifying your scene or running on a GPU with more free RAM to see if it solves the crash. Otherwise, upgrading to the latest nvidia gpu driver and Arnold core (available from www.arnoldrenderer.com) might fix the crash

00:03:02 15508MB | render done

Now, I can see that log mentions possibility of running out of memory, but my question is HOW the heck it would it eat all my GPU memory - my scene textures certainly dont take up 8GB... And yes, they are tx'd. I was very cautious about this when building the scene and I kept reusing the same textures all over with just different aiColorCorrect nodes to get a different look out of it in order to minimize the amount of texture files I need to actually load.

Im also aware of some meshes are throwing UV error in the log, but issue happens even if I delete them from scene.

If I understand correctly, for Arnold GPU to launch rendering, it needs to load all the textures into the GPU VRAM and since my rendering actually starts, I would say it is not the VRAM then..? Besides of that, the log says GPU had 312MB free when crash occured.. which is not a lot, but its not 0 either.

If anyone would be able to help with the problem it would be really appreciated.