https://devzone.nordicsemi.com/f/nordic-q-a/16961/receives-name-dfu-is-not-defined-from-master-control-panelHi I&#39;m trying to perform update (DFU) of my application using Master Control Panel 3.10.0. I&#39;m connecting, discover services (see DFU service available), then press &quot;DFU&quot; button, choosing zip package or hex to update, click to start, but update failen-USTelligent Community 13Tue, 11 Oct 2016 12:32:15 GMThttps://devzone.nordicsemi.com/thread/65064?ContentTypeID=1Tue, 11 Oct 2016 12:32:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02bebda5-eb49-4165-892f-22ff0a1a0b8fjokii<p>Reinstallation (&quot;Repair&quot; option) fix issue. Thanks</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/65063?ContentTypeID=1Tue, 11 Oct 2016 05:45:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cc655e60-7868-43fc-82b7-115ac8e0c54cbjorn-spockeli<p>DFU with MCP should work just fine with SDK v10.0.0. I have never seen this type of error before. Have you tried to uninstall and re-install MCP? If that does not work, then you can try to downgrade your MCP version, you can find older versions <a href="https://www.nordicsemi.com/eng/nordic/Products/nRF51-DK/nRF-MCP-x86/38909">here</a>.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/65062?ContentTypeID=1Tue, 11 Oct 2016 04:57:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dce613e4-315c-4b11-8268-674ee78d9f54jokii<p>I&#39;m using SDK v10.0.0 and I&#39;m not going to move to 12, since project is finished and tested 99%. Dfu process seems even not start.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/65061?ContentTypeID=1Mon, 10 Oct 2016 12:57:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d488fe2f-8882-453c-ac88-01731a068da6bjorn-spockeli<p>Are you using SDK v12.0.0?</p><div style="clear:both;"></div>