https://devzone.nordicsemi.com/f/nordic-q-a/3780/dfu-bootloader-hangs-on-sd_softdevice_vector_table_base_setI have implemented a boot loader for DFU based on the sdk v6.1 DFU project. After a when an upgrade is triggered within the application soft reset by the application: err_code = sd_power_gpregret_clr(0xff); APP_ERROR_CHECK(err_code); err_codeen-USTelligent Community 13Wed, 17 Sep 2014 10:58:24 GMThttps://devzone.nordicsemi.com/thread/13683?ContentTypeID=1Wed, 17 Sep 2014 10:58:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:07b648e8-96b3-48a2-8e6a-49926f0ed474Hung Bui<p>Hi TEJ, I just updated the answer, could you please also update (or delete) your comment ?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13682?ContentTypeID=1Wed, 17 Sep 2014 10:23:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a617109-2e97-4641-9812-1603feeb7436TEJ<p>I can confirm that removing the if(init_softdevice) solves the issue.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/13681?ContentTypeID=1Tue, 16 Sep 2014 11:43:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:588f5746-0795-49c4-afd6-cfb591fdc5e8Hung Bui<p>[EDITED] Hi TEJ,</p> <p>It&#39;s our modification with the bootloader. Now the bootloader can be triggered directly from the application. The softdevice will not be reinitialized when bootloader starts if it&#39;s jumped from the application that&#39;s why you got a hardfault because in your case you reset the chip and the softdevice is disabled. So in order to start the bootloader from application NVIC_SystemReset() should not be called , instead please follow <a href="https://devzone.nordicsemi.com/documentation/nrf51/6.1.0/s110/html/a00076.html#application_dfu_support_sec">this documentation</a></p><div style="clear:both;"></div>