Stable Diffusion WebUI: could not find upscaler named 4x_NMKD-Superscale-SP_178000_G

Silicon Gamer

06/06/2025

updated 06/06/2025

Stable Diffusion WebUI could not find upscaler named file

1. could not find upscaler named Superscale?

Today, when I was using Stable Diffusion WebUI to reproduce someone else’s image material, I encountered an error: “could not find upscaler named 4x_NMKD-Superscale-SP_178000_G.”

2. What’s the real problem?

The error message is clear, but ​it can be confusing at first glance​ because Stable Diffusion WebUI involves ​too many types of model files. Beyond the model files in the models directory, ​some plugins may also require model files​ to function properly.

The real questions burning in your mind are probably:​​

  1. ​What exactly is missing?​​ (Like, what’s the darn filename?)
  2. ​Where do I even find this mysterious file?​​ (Seriously, the internet is vast…)
  3. And once I have it, where the heck do I put it?​​ (models? Some plugin subfolder? )

3. Practical solution

The solution is straightforward: download the missing file and place it in the correct path.

Download the file “4x_NMKD-Superscale-SP_178000_G.pth” and place it here:”……\stable-diffusion-webui\models\ESRGAN\4x_NMKD-Superscale-SP_178000_G.pth”

 

4. Where to Download?​​

You can usually find them on huggingface.co. I’ve actually put together a handy pack of commonly used ESRGAN files locally. If you’re struggling to track down any of them, just ​drop me an email​ 💌 or ​leave a comment below​ 👇! Happy to share!

 

5. Useful experience

​Typically, this error message – “could not find upscaler named” – occurs when certain files are missing in the stable-diffusion-webui\models\ESRGAN\ directory.​

 

6. Tips

Finally, do not forget to restart Stable Diffusion WebUI, it’s very important.

Leave a Comment