https://devzone.nordicsemi.com/f/nordic-q-a/20124/dfu--error-after-executing-err_code-ble_dfu_init-m_dfus-dfus_initMy problem: The run of my 1. DFU - Implementation delivers an error code after executing the line &quot;err_code = ble_dfu_init(&amp;m_dfus, &amp;dfus_init);&quot;. For my opinion this is caused by reservice_uuid.type = 0. The parameter of my application are the followingen-USTelligent Community 13Thu, 02 Mar 2017 12:20:19 GMThttps://devzone.nordicsemi.com/thread/78357?ContentTypeID=1Thu, 02 Mar 2017 12:20:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6b3366a3-2ddd-477f-921e-c158999749ecUwe<p>My first comment described only an intermediate state. The final solution results of the reading of the answer of a former question and is based on the definition of two UUIDs:</p> <pre><code>ble_enable_params.common_enable_params.vs_uuid_count = 2; //NUMBER OF UUIDs; </code></pre> <p>and the repetition of finding the new base number by help of the return values of</p> <pre><code>err_code = sd_ble_enable(&amp;ble_enable_params,&amp;app_ram_base); </code></pre> <p>Now the advertiser offeres the Own-Service-UUID and the DFU-UUID.</p><div style="clear:both;"></div>