https://devzone.nordicsemi.com/f/nordic-q-a/6522/nothing-is-programmed-to-nrf51Hi All, I&#39;ve got a nRF51-DK development kit, and I just compiled and downloaded my first example to it through Keil uVision. Problem is that nothing happens when the program should be running. And with good reason, because if I run a debug sessionen-USTelligent Community 13Fri, 07 Jul 2017 06:46:54 GMThttps://devzone.nordicsemi.com/thread/22772?ContentTypeID=1Fri, 07 Jul 2017 06:46:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0a386931-5add-4d38-9b8b-33958ca63192YASH<p>When i loaded the softdevice, and after that loaded my program, it says :- Error: Flash Download Failed - &quot;Cortex-Mo&quot;. Please help</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22774?ContentTypeID=1Fri, 07 Jul 2017 06:46:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3893f8d7-b842-47d4-8f19-0d8cb2afc4c8YASH<p>When i loaded the softdevice, and after that loaded my program, it says :- Error: Flash Download Failed - &quot;Cortex-Mo&quot;. Please help</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22776?ContentTypeID=1Fri, 07 Jul 2017 06:26:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a73b83f3-04cf-47b9-b59b-23384fac658aYASH<p>When i loaded the softdevice, and after that loaded my program, it says :- Error: Flash Download Failed - &quot;Cortex-Mo&quot;. Please help</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22775?ContentTypeID=1Wed, 15 Apr 2015 17:42:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d523c7ce-b377-4c72-ba53-062bf2feaf4dJohn<p>The chips come from the factory unprogrammed to use any project that expects BLE to work, you first must load the Nordic BLE stack known as the Soft Device Stack. I typically program that onto my development boards using the nRFGO studio program.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22773?ContentTypeID=1Wed, 15 Apr 2015 17:41:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:84be21f2-fe94-4b95-981f-7c544e4ef57aGuilherme de Paula<p>Did you use the nRF Go Studio to load the S110 Soft Device (Bluetooth Smart Stack) to the board as well? If you haven&#39;t, you need to do that first.</p><div style="clear:both;"></div>