https://devzone.nordicsemi.com/f/nordic-q-a/23917/how-to-debug-when-program-flow-goes-to-0xfffffffeHi, when doing wired uart-BLE combination and increasing the traffic in the uart comms and BLE comms, at some unpredictable stage, the program flow goes to 0xFFFFFFFE. Any thoughts as how to debug this? I do APP_ERROR_CHECK every time and it is fine.en-USTelligent Community 13Sun, 30 Jul 2017 02:31:30 GMThttps://devzone.nordicsemi.com/thread/94130?ContentTypeID=1Sun, 30 Jul 2017 02:31:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:44504277-d9e2-40d7-822b-bf5715aa6c38RK<p>Good chance you blew the stack. Take a look at the stack pointer and the last stuff on the stack after you end up there, quite likely it&#39;s run into the heap or the program data and a return has dumped you somewhere invalid. Also look at the registers, are you in hardfault or memfault or some other error?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/94131?ContentTypeID=1Sun, 30 Jul 2017 00:46:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a0c7a18-e05d-4d70-b069-4f5f8a3166a4Nguyen Hoan Hoang<p>Looks like bad pointer or lockup some where. Traffic increase means using more buffers and you ran out of buffers. So you likely to lockup and softdevice doesn&#39;t like it and goes to hardfault.</p><div style="clear:both;"></div>