RuntimeError: CUDA error: device-side assert triggered

If you are working on the CUDA enable GPU you may get the error RuntimeError: CUDA error: device-side assert triggered. There can be many causes of it. In this tutorial You will know how to solve the CUDA error: device-side assert triggered error.

Why does the RuntimeError: CUDA error: device-side assert triggered occur?

The error message “RuntimeError: CUDA error: device-side assert triggered” occurs when a CUDA kernel (a function executed on the GPU) encounters an assertion error on the device side. This typically indicates an issue with your CUDA code or the data being processed.

How to solve RuntimeError: CUDA error: device-side assert triggered Occurs?

Below are the solutions for the error.

Verify CUDA version

Ensure that the CUDA version you are using is compatible with your GPU and the software dependencies of your project.

Update drivers

Make sure your GPU drivers are up to date. Visit the manufacturer’s website (NVIDIA, AMD, etc.) to download and install the latest version.

Check for hardware issues

Ensure that your GPU hardware is functioning properly. You can try running other GPU-intensive applications or perform diagnostics to check for any potential hardware problems.

Debug your code

Analyze your CUDA code and identify potential issues such as out-of-bound memory access, uninitialized variables, or incorrect function calls. Review any device-side asserts in your code that might trigger this error and examine the associated conditions for correctness.

Check CUDA memory allocation

Verify that you correctly allocate and deallocate memory on the device. Ensure that your memory transfers between the device and the host are performed correctly.

Test with minimal code:

Create a minimal working example that reproduces the error to isolate and identify the issue more easily. This will help identify the specific lines of code that trigger the error.

Utilize CUDA debugging tools

CUDA provides debugging tools like CUDA-GDB and CUDA-MEMCHECK, which can help you identify and resolve issues in your CUDA code.


Cuda acts like the core of the processor. If you are getting the error RuntimeError: CUDA error: device-side assert triggered then the above methods will resolve your issues. In most cases, the issue is resolved when you will update the drivers.

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