https://devzone.nordicsemi.com/f/nordic-q-a/119247/failure-to-program-nrf54l15-with-nrfjprogIt&#39;s successful when I use west : % west flash -d build But it&#39;s failed when I use nrfjprog : % nrfjprog --program merged.hex --reset OR % nrfjprog -f unknown --program merged.hex --reset The result is as follow: [error] [ Client] - Encountereden-USTelligent Community 13Mon, 24 Feb 2025 11:00:39 GMThttps://devzone.nordicsemi.com/thread/524309?ContentTypeID=1Mon, 24 Feb 2025 11:00:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:310f74f4-cebd-4e0d-84eb-d92e8d758b19Sealin<p><span>The&nbsp;</span><span>nrfutil works. Thank you!</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/524308?ContentTypeID=1Mon, 24 Feb 2025 11:00:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0657007b-d099-4976-ad7c-988ff9813cdcSealin<p>The&nbsp;<span>nrfutil works. Thank you!</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/524283?ContentTypeID=1Mon, 24 Feb 2025 09:47:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5c39b8ba-dc64-4974-9094-0afc32d4a286Kazi Afroza Sultana<p>Hello,</p> <p><strong>nrfjprog </strong>is no longer the recommended tool for programming with NRF54L15. You need to use nrfutil.&nbsp;<a href="https://docs.nordicsemi.com/bundle/nrfutil/page/nrfutil-device/guides/programming_nrf54L15.html#programming-application-firmware-on-nrf54l15">Programming application firmware on nRF54L15</a></p> <p>To run all the images after building, it is better to use west build... and west flash --recover.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/524267?ContentTypeID=1Mon, 24 Feb 2025 09:10:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:646b3f5b-3976-4a56-9a7c-da55000f315ePaKa<p>Try to use nrfutil instead, that&#39;s the programming solution for nRF54 devices</p><div style="clear:both;"></div>