https://devzone.nordicsemi.com/f/nordic-q-a/33934/ble_app_hrs_rscs_relay-dfu---compilation-errorHi, I&#39;m trying to merge central/peripheral example &quot;ble_app_hrs_rscs_relay&quot; with &quot;ble_app_buttonless_dfu&quot;, and get error while compiling ‘ble_dfu_unbonded.c’: I&#39;ve included all header files and added all *c files to the project but something isen-USTelligent Community 13Sat, 09 Jun 2018 22:40:34 GMThttps://devzone.nordicsemi.com/thread/135441?ContentTypeID=1Sat, 09 Jun 2018 22:40:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8657afb2-7817-4aee-acd8-8133d75fd373rastik<p>Hello,</p> <p>I had the same problem and resolved it by adding these preprocessor defines:</p> <p style="padding-left:30px;"><pre class="ui-code" data-mode="text">NRF_DFU_SVCI_ENABLED NRF_DFU_TRANSPORT_BLE=1</pre></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/130527?ContentTypeID=1Wed, 02 May 2018 12:05:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0f2739b4-2ef1-4649-9686-7d56953d7717H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>Do you have the preprocessor define &quot;SVC_INTERFACE_CALL_AS_NORMAL_FUNCTION&quot; set in your project configuration? From your build.log, it seems that it&#39;s missing.</p> <p>This can be set when highlighting your project -&gt; edit&nbsp;options -&gt; preprocessor -&gt; preprocessor defines.</p> <p>To view all common preprocessor defines, you can select the private configuration &quot;Common&quot;.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Håkon</p><div style="clear:both;"></div>