https://devzone.nordicsemi.com/f/nordic-q-a/93516/cannot-update-hex-file-properlyHello, I was working on DFU where i am stuck in a problem when i update the code via Seggar UI--&gt; Build--&gt; build and run, here everything works fine that is i can see the com port in device manager but when i go to Seggar UI--&gt; Target --&gt; Downloaden-USTelligent Community 13Thu, 03 Nov 2022 13:50:10 GMThttps://devzone.nordicsemi.com/thread/393916?ContentTypeID=1Thu, 03 Nov 2022 13:50:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ec8d5a91-6844-444c-aa3b-acfa5902d1c5Amanda Hsieh<p>Hi,&nbsp;</p> <p>If you take a look at the log after running by &quot;<span>build and run</span>&quot;, you would see it downloads&nbsp;mbr.hex from&nbsp;nRF5_SDK\components\softdevice\mbr\hex<br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1667482735698v1.png" alt=" " /></p> <p>If you would like to program the image manually, don&#39;t forget the mbr image.</p> <p>You also could program the image via Target -&gt; Download&nbsp;secure_bootloader_usb_mbr_pca10056 which would flash app with mbr image automately.&nbsp;</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1667483141236v2.png" alt=" " /></p> <p>Regards,<br />Amanda H.</p><div style="clear:both;"></div>