Unable to enter DFU mode with secure bootloader - SDK 17.1.0 and GCC 9 2020-q2-updatehttps://devzone.nordicsemi.com/f/nordic-q-a/112030/unable-to-enter-dfu-mode-with-secure-bootloader---sdk-17-1-0-and-gcc-9-2020-q2-updateHello everyone, I&#39;ve been spending a lot of time to fix the issue not being able to enter DFU mode with the following error. I&#39;ve changed so many versions of GCC, but it still didn&#39;t work. I&#39;m using Window 11, SDK 17.1.0, GCC 9 2020-q2-update, Seggeren-USTelligent Community 13Thu, 13 Jun 2024 23:49:45 GMTRE: Unable to enter DFU mode with secure bootloader - SDK 17.1.0 and GCC 9 2020-q2-updatehttps://devzone.nordicsemi.com/thread/488764?ContentTypeID=1Thu, 13 Jun 2024 23:49:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:79620d21-2997-4299-b1bc-140c542b3eefTai<p>Thanks <a href="https://devzone.nordicsemi.com/members/vibe">Vidar Berg</a>&nbsp;. It worked!</p><div style="clear:both;"></div>RE: Unable to enter DFU mode with secure bootloader - SDK 17.1.0 and GCC 9 2020-q2-updatehttps://devzone.nordicsemi.com/thread/488419?ContentTypeID=1Wed, 12 Jun 2024 06:30:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ef34755-4f97-4f6c-9c0f-df808a2dffc6Vidar Berg<p>Hello,</p> <p>Please try using Segger Embedded Studio v5.42a instead. SDK 17.1.0 was tested and verified with this version. SES v6.2 and above is not compatible with this SDK.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>