No file build/zephyr/zephyr.hex created when building, which is necessary to generate the RCP firmware package

[Koert]

I'm following the instructions to build a co-processor using the nRF52840 dongle, on Ubuntu 22.04:
https://docs.nordicsemi.com/bundle/ncs-2.9.0/page/nrf/protocols/thread/tools.html#ug-thread-tools-tbr

In step 3b, you have to generate the RCP firmware package using the following command:
nrfutil pkg generate --hw-version 52 --sd-req=0x00 \
 --application build/zephyr/zephyr.hex --application-version 1 build/zephyr/zephyr.zip

Running this gives the following error:
FileNotFoundError: [Errno 2] No such file or directory: 'build/zephyr/zephyr.hex'

I've tried rebuilding, but the build/zephyr directory only contains kconfig. For building I used the command:
west build -p always -b nrf52840dongle/nrf52840 nrf/samples/openthread/coprocessor/

In which I could not find any errors or failed executions.

Does anyone know how to solve this?

Thanks in advance!

[Edvin]

Hello,

Thank you for reporting.

Since NCS v2.7.0, sysbuild was introduced as a new building architecture. The build folder is organized a bit differently, but I see that this documentation was not updated. I have reported it internally.

What you need to do is to replace all the paths saying "build/zephyr/..." with "build/coprocessor/zephyr/..."

The same goes in section 3e. If you open the build folder, you should be able to navigate to the .hex file, and verify that it is actually found in build\coprocessor\zephyr\zephyr.hex. 

Best regards,

Edvin

[Koert]

Thanks! Glad it's just a quick fix.