https://devzone.nordicsemi.com/f/nordic-q-a/74966/device-config-and-programmingHello All, I am looking to use the nRF52840 for a ZigBee project. I am looking at the ZigBee light bulb example and following a few posts here I got it building. I can not get it to program using &quot;make flash&quot;. I keep getting the error: Ien-USTelligent Community 13Tue, 11 May 2021 11:47:25 GMThttps://devzone.nordicsemi.com/thread/309211?ContentTypeID=1Tue, 11 May 2021 11:47:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d6c62f5c-a27d-4b94-b795-dc2e32703335Simonr<p>Hi</p> <p>Build tools are by&nbsp;<span>default installed to C:\Program Files\GNU ARM Eclipse\Build Tools\VERSION\bin or C:\Program Files (x86)\GNU ARM Eclipse\Build Tools\VERSION\bin if you installed the package that was referenced in <a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/development-with-gcc-and-eclipse">this tutorial</a>. Please verify that mkdir.exe is located in this folder.</span></p> <p><span>For a more straightforward way of flashing an example onto your board, please check out the<a href="https://infocenter.nordicsemi.com/topic/ug_nc_programmer/UG/nrf_connect_programmer/ncp_introduction.html"> nRFConnect Programmer app for desktop</a>, which lets you connect to DKs and erase/flash applications onto your device with an easier to use GUI. Are you using a development kit or a custom/third party device for the development of your application?</span></p> <p><span>Best regards,</span></p> <p><span>Simon</span></p><div style="clear:both;"></div>