RealityCapture - Cuda Error

Community Community & Industry Discussion
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1

Hi all, sorry for my bad English.
Since I’m not an expert, I’m here to ask for help

I have a problem regarding CUDA while using the program RealityCapture (EpicGames). I wanted to use this for photogrammetry, I made several attempts to test a model with 20 images taken from the internet:

  1. the first attempt came out a big white cube… because I had left the background. (but at least the “model” came out).
  2. the second attempt, after removing the background, came out an “ugly” model (it was expected, but I only needed it to see how the program worked, so everything was fine).
  3. the third attempt, I tried to use the “Calculate Model - High Quality” mode… and it gave me 2 errors:
    “CUDA error: (700). Please try updating your CUDA driver.”
    “CUDA error: 700: an illegal memory access was encountered.”

but after this, even if I go back to using “Calculate Model - Normal Quality” (used in steps 1-2), I get the same error.

I have never installed other versions of CUDA or similar (it’s the first time I used it).

Driver:
CUDA (v12.9)
CudNN (v9.10)
Nvidia Studio (v576.52 - 19 may 2025)

I use NVIDIA GeForce GTX 1660
Windows 10

I don’t know if you need more information

thanks a lot :wink:

3

Hey there, and thank you for posting on our community :slightly_smiling_face:
Let me try to see if I can help you :wink:
“The CUDA error 700 (‘illegal memory access’) usually indicates that your GPU tried to access memory it wasn’t supposed to. This can happen if the system runs out of memory or if something crashes during GPU operations, and unfortunately, it can sometimes corrupt the CUDA context. That’s why even going back to ‘Normal Quality’ still throws the same error, the GPU is still in an unstable state.”
Here are the steps I would recommend trying for troubleshooting if you haven’t already:

  1. Restart Application ( if that fails, see number 2)
  2. Restart your computer to make sure that it clears the CUDA context and resets the GPU.
  3. Make sure you have the latest version of RealityCapture
  4. Check GPU memory usage. In this case GTX 1660 has 6GB VRAM, which is only enough for a small/ medium dataset

Cheers

MC