https://devzone.nordicsemi.com/f/nordic-q-a/72582/debugging-hard-faults-in-ncsHi Nordic Community, I have been experimenting with samples in NCS and making modifications. Sometimes adding some code causes a hardfault during runtime. I can often find the root cause, e.g de-referencing a struct in memory that doesn&#39;t existen-USTelligent Community 13Wed, 10 Mar 2021 14:44:10 GMThttps://devzone.nordicsemi.com/thread/299055?ContentTypeID=1Wed, 10 Mar 2021 14:44:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5e410241-c9d1-4102-8785-9a2d91e62ee5Simon<p>First, try setting CONFIG_DEBUG_OPTIMIZATIONS=y in the prj.conf file.</p> <p>Could you try to press continue (green arrow) and see if you end up in <a href="https://github.com/nrfconnect/sdk-zephyr/blob/6bc4a6cda158a7f8013fb59975d00617ed623ea7/arch/arm/core/aarch32/cortex_m/fault.c#L552">secure_fault()</a>&nbsp;and/or <a href="https://github.com/nrfconnect/sdk-zephyr/blob/6bc4a6cda158a7f8013fb59975d00617ed623ea7/arch/arm/core/aarch32/fatal.c#L49">esf_dump()</a>?</p> <p>Also, could you try to enable this in prj.conf:</p> <p><pre class="ui-code" data-mode="text">CONFIG_RESET_ON_FATAL_ERROR=n CONFIG_LOG=y</pre></p> <p><span>Then you should be able to see more information about the hard fault. Open a serial terminal like Termite to see the log.</span></p> <p><span>Best regards,</span></p> <p><span>Simon</span></p><div style="clear:both;"></div>