https://devzone.nordicsemi.com/f/nordic-q-a/123516/toolchain-nrf-connect-sdk-version-v3-0-2-vs-v2-6-0I followed the steps below to set up my development environment, based on the instructions from link Setup 1 1. Installed SEGGER J-Link v8.56a   Path: C:\Program Files\SEGGER\JLink_v856a 2. Installed nrfutil and nrfutil device   Path: C:\ncs 2.en-USTelligent Community 13Wed, 06 Aug 2025 12:09:34 GMThttps://devzone.nordicsemi.com/thread/544773?ContentTypeID=1Wed, 06 Aug 2025 12:09:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ffd6ef6-1ea5-4e0c-b574-939b2a93ff57Edvin<p>Hello,</p> <p>In fact, for NCS &lt; v3.0.0, you need nRF Command Line Tools installed in order to flash devices. It will not interfere with the current setup 1.&nbsp;</p> <p>But what can interfere with your current setup 1 is if you install the old version of nrfutil. But there is no need to do so. The old functionality of nrfutil is baked into the new one, if you run &quot;nrfutil install nrf5sdk-tools&quot; (for use with the nRF5 SDK bootloader).&nbsp;</p> <p>But you can safely install <a href="https://www.nordicsemi.com/Products/Development-tools/nRF-Command-Line-Tools/Download">nRF Command Line Tools</a>. Also, make sure that it is in path on your computer, so that it can be used from any command line.</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>