https://devzone.nordicsemi.com/f/nordic-q-a/21838/sporadic-hardfault-on-nrf51822-sdk9-s130Sporadic program restart from main. I suppose, it is hardfault exception. How can I catch it? Check pls my memory settings. ROM: start- 0x1c000 size 0x23000 RAM: start- 0x200028000 size 0x5800 stack and heap I changed to 1024 for each. anden-USTelligent Community 13Mon, 08 May 2017 11:04:43 GMThttps://devzone.nordicsemi.com/thread/85761?ContentTypeID=1Mon, 08 May 2017 11:04:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:00782287-d5ac-41f0-966a-d9deb5782620Petter Myhre<p>I agree with Alex, some more information <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/85760?ContentTypeID=1Fri, 05 May 2017 12:00:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:928ba261-87ad-4e54-a068-6796e5f627d1Alex<p>If program reset in app_error_handler() due to error then set breakpoint inside that function. If it is hardfault exception then you may find some help <a href="https://devzone.nordicsemi.com/question/126737/using-i2c-with-two-devices-on-app-timer-gets-hardfault/?comment=126828#comment-126828">here</a></p><div style="clear:both;"></div>