Failed in initializing the SoftDevice handler modulehttps://devzone.nordicsemi.com/f/nordic-q-a/1681/failed-in-initializing-the-softdevice-handler-moduleI&#39;m using PCA100001 board with pure-gcc Makefile and s110_nrf51822_5.2.1_softdevice. And I&#39;m writing simple code customizing s110 samples like below: static void ble_stack_init(void) { // Initialize the SoftDevice handler module. SOFTDEVICE_HANDLER_INITen-USTelligent Community 13Mon, 24 Feb 2014 02:31:00 GMTRE: Failed in initializing the SoftDevice handler modulehttps://devzone.nordicsemi.com/thread/7434?ContentTypeID=1Mon, 24 Feb 2014 02:31:00 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5528653d-04d2-4162-9df2-25c0171ee46fKen Matsui<p>Hi Håkon -</p> <p>Thank you for your reply. I was using SDK v5.1.0.</p> <p>I changed to use nRF51 SDK v4.4.2 and I modified codes. then now all issues was cleared. Thank you so much!!</p> <p>Best regards</p> <ul> <li>Ken</li> </ul><div style="clear:both;"></div>RE: Failed in initializing the SoftDevice handler modulehttps://devzone.nordicsemi.com/thread/7433?ContentTypeID=1Fri, 21 Feb 2014 11:07:54 GMT137ad170-7792-4731-bb38-c0d22fbe4515:136eee6d-6490-44fc-9be6-2a79bcb09fd1H&#229;kon Alseth<p>Hi Ken,</p> <p>Which SDK version are you using? Note that SD v5.2.1 is only compatible with SDK v4.x. Take a look at this paper for more detailed information: <a href="https://www.nordicsemi.com/eng/nordic/download_resource/24719/3/16774796">www.nordicsemi.com/.../16774796</a></p> <p>Best regards Håkon</p><div style="clear:both;"></div>