https://devzone.nordicsemi.com/f/nordic-q-a/59354/failure-to-develop-a-custom-service---nrf52833-dkHi, I&#39;m trying to develop a custom service and am following a few examples in trying to do so. The software crashes for me everytime after advertising the new service or else in services_init(). I&#39;m using SEGGER tools on linux and the nRF52833-DKen-USTelligent Community 13Mon, 23 Mar 2020 10:45:23 GMThttps://devzone.nordicsemi.com/thread/241085?ContentTypeID=1Mon, 23 Mar 2020 10:45:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc602bbd-fec8-45e1-8fe2-df4751e64135Kenneth<p>Sounds to me that you have a breakpoint in&nbsp;app_error_fault_handler(), and if you use DEBUG define in preprocessor then you should be able to identify the file name, line number and actual error code of the assert.&nbsp;What api call is causing the assert and what is the error code?</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>