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,

Please follow the Academy course and ensure that you have completed all the steps. Also, make sure that nRF Util is added to your system path. You can refer to this blog for guidance.

Kindly share your build configuration and include a screenshot of your entire VS Code window, including where you run your command.

Kind regards,
Abhijith

[wac_2025_may]

Hi,
Thank you for your feedback.
I am strictly following the Academy course for my evaluation.
I couldn't flash FW despite multiple attempts.

I followed [v2.90-v2.70] from academy:

1. Install nRF Command Line Tools. -->nrf-command-line-tools-10.24.2-x64.exe
2. Installl SEGGER J-Link v8.10f -->JLink_Windows_V810f_x86_64.exe
3. Install nrfutil and the nrfutil device command --> nrfutil.exe (64 bit version)
- performed nrfutil self-upgrade and nrfutil install device, updated Environment variable C:\nordic_tools
4. Install VS Code --> VSCodeUserSetup-x64-1.100.0.exe
5. Install nRF Connect Extension Pack --> all requested packs
-nRF Connect for VS Code, nRF DeviceTree, nRF Kconfig, nRF Terminal, C/C++ from Microsoft, GNU Linker Map Files, CMake

6. Install Toolchain -->v2.9.2
7. Install nRF Connect SDK -->v2.9.2