nRF54L15 DK Build Error: Unknown Device Family (Generic)

[wac_2025_may]

Hi, I'm a beginner and I'm trying to run an LED blinking program.
However, I'm encountering a device-related error.

I've followed tutorials and installed all the necessary tools and SDKs.

But I always get the following error:

FATAL ERROR: command exited with status 1: nrfutil --json device x-execute-batch --batch-path
Device error: Unknown device: Unknown device family (Generic)

Can someone help me understand what this error means and how to fix it?
Thank you.

[Menon]

Hello,

I went through the replies you shared and thanks for providing the details. I'm still not sure about the build configuration you're using. Are you building the application for the PDK or the DK?

The AP protection should be removed by clicking "YES" in the pop-up, but I'm not sure why that's not working for you. Try using the nrfutil device recover command to remove AP protection, see recovering device section .
I've seen a similar error message before, and it was resolved after updating nRF Util to the latest version. Can you try the nrfutil upgrade device command and see if that resolves the issue? Here's another old ticket of mine for reference.

If the issue persists, I recommend collecting logs as mentioned in my first comment to get more details.

Kind Regards,

Abhijith