# CUDA error in 10ns run

**URL:** https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550
**Category:** User discussions
**Tags:** mdrun
**Created:** [March 8, 2024, 12:20am UTC](https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550 "2024-03-08T00:20:21Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![EMMartin](https://avatars.discourse-cdn.com/v4/letter/e/b77776/32.png) [@EMMartin](https://gromacs.bioexcel.eu/u/EMMartin)
#### Post date: [March 8, 2024, 12:20am UTC](https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550/1 "2024-03-08T00:20:21Z")

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GROMACS version: 2024.1  
GROMACS modification: No

2 NVIDIA GeForce RTX 2070  
Driver Version: 545.23.08 CUDA Version: 12.3  
AMD Ryzen 9 3900x 12-core processor x24  
UBUNTU 22.04.3 LTS

The installation was made with GPU support and MPI default on. The simulations randomly end before completing the task. The task was divided in 4 MPI as pp0, pp0 , pp1, pp1. Could this be a hardware issue or could it be a code one?

Assertion failed:  
Condition: stat == cudaSuccess  
Cuda error #700 an illegal memory access

Assertion failed:  
Condition: stat == cudaSuccess  
cudaStreamSynchronize failed. CUDA error #719 (cudaErrorLaunchFailure):  
unspecified launch failure.  
Source file: src/gromacs/gpu\_utils/device\_stream.cu (line 107)  
Function: DeviceStream::synchronize() const::\<lambda()\>

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### Author: ![scinikhil](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/scinikhil/32/3483_2.png) [@scinikhil](https://gromacs.bioexcel.eu/u/scinikhil)
#### Post date: [March 8, 2024, 8:08pm UTC](https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550/2 "2024-03-08T20:08:20Z")

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what you are trying to do? is it pulling simulation?

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<div class="post-metadata">

### Author: ![EMMartin](https://avatars.discourse-cdn.com/v4/letter/e/b77776/32.png) [@EMMartin](https://gromacs.bioexcel.eu/u/EMMartin)
#### Post date: [March 9, 2024, 12:21am UTC](https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550/3 "2024-03-09T00:21:16Z")

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Yes indeed, it is a pulling simulation. The first sample of the umbrella sampling.

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### Author: ![ackbar03](https://avatars.discourse-cdn.com/v4/letter/a/f0a364/32.png) [@ackbar03](https://gromacs.bioexcel.eu/u/ackbar03)
#### Post date: [May 4, 2024, 2:17am UTC](https://gromacs.bioexcel.eu/t/cuda-error-in-10ns-run/8550/4 "2024-05-04T02:17:52Z")

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Did you manage to solve this? I’m encountering the same issue