# Vray 6 suddenly crashing **URL:** \ **Category:** Issues\ **Created:** [December 15, 2022, 5:58pm UTC](https://forums.chaos.com/t/vray-6-suddenly-crashing/113249 "2022-12-15T17:58:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![glennco](https://avatars.discourse-cdn.com/v4/letter/g/5e9695/32.png) [@glennco](https://forums.chaos.com/u/glennco)\ **Post date:** [December 15, 2022, 5:58pm UTC](https://forums.chaos.com/t/vray-6-suddenly-crashing/113249/1 "2022-12-15T17:58:14Z")
note: see second update below, all is back to normal. Hello, What does this message mean, and can I use it to solve the crash? {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:50,“so urce”:“V-Ray”,“msg”:“[VUtils::PinnedGPUBuffer::uploadAsync] 718: Failed to upload buffer of size 4!”,“time”:“2022-12-15T17:36:03.528Z”,“v”:0} There are about 2000 lines of that message, then Vray crashes & Rhino closes. Model has been stable until yesterday, I made a days worth of changes. There are 4 Rhino clipping planes for the room, associated with 4 saved views. Each saved view rendered until recent additions to room. 2 of the views render fine, 2 crash. Other projects/files render fine, only crashing here. CUDA GPU & CPU Thanks, Glenn Rhino 7 SR25 2022-11-22 (Rhino 7, 7.25.22326.19001 Vray 6 6.00.01 11/3/22 Vray core 6.00.21 “PTX max register count 128:128”,“time”:“2022-12-15T17:36:01.381Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Building optimized CUDA kernel (3) for comp cap 7.5 for device 1…”,“time”:“2022-12-15T17:36:01.381Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“PTX file generated with CUDA Toolkit v10.0 for CUDA compute capability 3.0.”,“time”:“2022-12-15T17:36:01.382Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Optimized CUDA kernel assembled successfully”,“time”:“2022-12-15T17:36:01.382Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Total memory for device 1 : 8191 MB, free 5851 MB”,“time”:“2022-12-15T17:36:01.382Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Maximum kernel work group size: 1024”,“time”:“2022-12-15T17:36:01.387Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Running RTEngine”,“time”:“2022-12-15T17:36:01.387Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Using adaptive lights ver2”,“time”:“2022-12-15T17:36:01.387Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“GPU adaptive dome light uploaded (0), flags=2”,“time”:“2022-12-15T17:36:01.387Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Maximum kernel work group size: 1024”,“time”:“2022-12-15T17:36:01.508Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Device[1]: NVIDIA GeForce RTX 2070 selected for GPU light cache calculations.”,“time”:“2022-12-15T17:36:01.646Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Building GPU light cache.”,“time”:“2022-12-15T17:36:01.646Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Tracing 1000000 image samples for light cache in 64 passes.”,“time”:“2022-12-15T17:36:01.646Z”,“v”:0} {“name”:“vray-neui”,“hostname”:“Glenn”,“pid”:1924,“level”:30,“so urce”:“V-Ray”,“msg”:“Using 3.50 MB for light cache preview buffer”,“time”:“2022-12-15T17:36:01.646Z”,“v”:0} Update I remade an emissive material (plain white, no texture) as version 6 (was originally created in V5). That material is in another part of the model, not shown in any of the 4 views/clips I am using today. That has ended the crashes, but now these errors in VFB log: (here is a partial) Thanks, Glenn [11:55:41.331] Uploading texture “wine tile floor1.jpg” (idx=5) tile[0][0] at mip 5, 12x12, channels 3, 0KB [11:55:41.359] Uploading texture “wood cedar brazil01.jpg” (idx=7) tile[0][0] at mip 1, 128x256, channels 3, 96KB [11:55:41.471] Uploading texture “wallpaper1b.jpg” (idx=9) tile[0][0] at mip 0, 1000x725, channels 3, 2124KB [11:55:41.643] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:41.643] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:41.643] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:41.748] Uploading texture “wine tile floor1.jpg” (idx=5) tile[0][0] at mip 4, 25x25, channels 3, 1KB [11:55:41.783] Uploading texture “wine tile floor1.jpg” (idx=5) tile[0][0] at mip 1, 200x200, channels 3, 117KB [11:55:41.894] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:41.894] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:41.894] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.098] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.098] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.098] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.174] Uploading texture “wine tile floor1.jpg” (idx=5) tile[0][0] at mip 0, 400x400, channels 3, 468KB [11:55:42.330] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.331] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. [11:55:42.332] Error : [GPULightCache::downloadGPULightCacheData] -1: Error during GPU Light Cache pass download. ​ SECOND ​Update I updated Nvidia driver to current recommended 526.98, and no more log errors listed in last update. So rendering as should be. Thanks, Glenn ​ ---
**Author:** ![tsvetomira.girginova](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/tsvetomira.girginova/32/271331_2.png) [@tsvetomira.girginova](https://forums.chaos.com/u/tsvetomira.girginova)\ **Post date:** [December 16, 2022, 9:41am UTC](https://forums.chaos.com/t/vray-6-suddenly-crashing/113249/2 "2022-12-16T09:41:28Z")
Thank you for sharing, Glenn! Using the recommended GPU driver version is the best practice. Contact us again if needed! If someone is experiencing issues finding it, it’s listed here: [V-Ray GPU | GPU rendering by Chaos](https://www.chaos.com/vray-gpu) ![image.png](https://europe1.discourse-cdn.com/chaosprd/original/3X/e/4/e43d6d8574653ce8b5e3f5cedec92dd7f4e41366.png) Best regards, TS​ ---
**Author:** ![Muhammed\_Hamed](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/muhammed_hamed/32/73779_2.png) [@Muhammed\_Hamed](https://forums.chaos.com/u/Muhammed_Hamed)\ **Post date:** [December 19, 2022, 6:04pm UTC](https://forums.chaos.com/t/vray-6-suddenly-crashing/113249/3 "2022-12-19T18:04:03Z")
Thank you for following up on your post @glennco I’m glad the issue is solved with a new driver Best, Muhammed