https://devzone.nordicsemi.com/f/nordic-q-a/10690/s120-2-1-0---system-reset-when-connection-to-s110-is-lostHello, are there some known reasons why S120 can reset the system while BLE connection to S110 peer is lost? I have S120 and two S110 connected. When i take one of S110&#39;s out of range of S120, in my RTT debug console (via JLinkRTTClient) i see that myen-USTelligent Community 13Wed, 09 Dec 2015 21:00:45 GMThttps://devzone.nordicsemi.com/thread/39911?ContentTypeID=1Wed, 09 Dec 2015 21:00:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6801283f-8dd2-47d6-8711-59233904e04ewoytekm<p>Hi Anders, you were right - reload was caused by APP_ERROR_CHECK. Indeed i am using one of example programs as a skeleton of my application, never actually bothered to check what APP_ERROR_CHECK does, and left it in few places in the code as it was in the example app. I need to implement my own error handling.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/39910?ContentTypeID=1Tue, 08 Dec 2015 12:53:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5a06bfec-636f-4930-bd80-c7db5e6db4ddAnders Strand<p>Read <a href="https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/?answer=60126#post-id-60126">this</a> post about error handling in the SDK, and tell us about what you find.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/39909?ContentTypeID=1Tue, 08 Dec 2015 11:54:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9e3f16e7-8b91-479f-8dba-a7ffbd8be1ecAnders Strand<p>Can you describe the code you are running? Is it an SDK example?</p><div style="clear:both;"></div>