https://devzone.nordicsemi.com/f/nordic-q-a/45859/unable-to-program-the-softdevice-for-nrf51822-using-keil-uvisionHi, I would like to program a ble basic program on nRF51822 chip. I have Keil uvision MDK 5, ST Link programmer, SDK 8.0.0 and S130 softdevice + a third-party development board. As I know I should program the Softdevice first. I chooseed the flash_softdeviceen-USTelligent Community 13Mon, 08 Apr 2019 05:13:52 GMThttps://devzone.nordicsemi.com/thread/180632?ContentTypeID=1Mon, 08 Apr 2019 05:13:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a840f381-798d-4abb-b580-c1d196f50c47ImanH<p>I solved the problem by replacing ST-Link with Segger Jlink.</p><div style="clear:both;"></div>