https://devzone.nordicsemi.com/f/nordic-q-a/28768/debug-app-with-softdeviceI try debug my app in keil debugger but it&#39;s often raised app: SOFTDEVICE: ASSERTION FAILED in SEGGER after step down through the code (in few steps). My app based on buttonless_dfu app from SDK14.2 nrf52832 I read here That the debugging deviceen-USTelligent Community 13Fri, 12 Oct 2018 11:11:17 GMThttps://devzone.nordicsemi.com/thread/152665?ContentTypeID=1Fri, 12 Oct 2018 11:11:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2724ab33-3d05-4e4f-94bb-a29e697e80a2ocram<p>It&#39;s possible with some restrictions. The solution described here worked for me:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/9622/application-debug-with-softdevice/35565#35565">https://devzone.nordicsemi.com/f/nordic-q-a/9622/application-debug-with-softdevice/35565#35565</a></p> <p>A more sophisticated solution is the monitore mode intended to let the softdevice run while debuggin lower priority application code, see:</p> <p><a href="https://github.com/NordicPlayground/j-link-monitoring-mode-debugging/#monitor-mode-debugging-in-keil-%C2%B5vision5-and-segger-embedded-studio">https://github.com/NordicPlayground/j-link-monitoring-mode-debugging/#monitor-mode-debugging-in-keil-%C2%B5vision5-and-segger-embedded-studio</a></p> <p>and</p> <p><a href="https://devzone.nordicsemi.com/b/blog/posts/segger-embedded-studio-part-2-monitor-mode-debuggi">https://devzone.nordicsemi.com/b/blog/posts/segger-embedded-studio-part-2-monitor-mode-debuggi</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/113987?ContentTypeID=1Fri, 22 Dec 2017 11:40:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:17fb8c14-ed3b-4bc4-9399-7ce203853f13shibshab<p>You can not do step by step debugging while having the SoftDevice active. This is due to the way the SoftDevice is implemented.</p> <p>What you need to do is to insert a breakpoint where you want to check stuff, and then run up to that point.</p><div style="clear:both;"></div>