https://devzone.nordicsemi.com/f/nordic-q-a/13579/multilink-peripheral-s110-v7-3-0-sdk-v6-1-0-don-t-startHi community, I&#39;m using the multi-link peripheral example from SDK v6.1.0 with s110 soft device version 7.3.0., this is cross-compiled with arm-none-eabi-gcc. The both version are compatible as defined in the matrix compatibility. The device is aen-USTelligent Community 13Mon, 02 May 2016 09:29:50 GMThttps://devzone.nordicsemi.com/thread/51791?ContentTypeID=1Mon, 02 May 2016 09:29:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3f59d968-b3ee-4bd0-957c-2389bfa14197paupoix<p>Hi Aryan,</p> <p>You have right, the code which calls sd_ble_enable is surrounded by S110 preprocessor flag which is not defined in my project (not KEIL project).</p> <p>Thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/51790?ContentTypeID=1Mon, 02 May 2016 09:19:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d1b1a55c-7bee-4ce4-8d35-7995300a689aSusheel Nuguru<p>That is because you have either not called sd_ble_enable function or the call for it has failed.</p> <pre><code>#define NRF_ERROR_STK_BASE_NUM (0x3000) ///&lt; STK error base #define BLE_ERROR_NOT_ENABLED (NRF_ERROR_STK_BASE_NUM+0x001) /**&lt; @ref sd_ble_enable has not been called. */ </code></pre><div style="clear:both;"></div>