https://devzone.nordicsemi.com/f/nordic-q-a/54324/how-to-debug-enabling-secure-bootloaderHello, We are trying to build asset tracker based on a modification of board nrf/boards/arm/nrf9160_pca20035. Every is good until we tried to enable secure bootloader option on project configure. There is &quot;solution load command failed&quot;. -------en-USTelligent Community 13Thu, 14 Nov 2019 23:52:25 GMThttps://devzone.nordicsemi.com/thread/220189?ContentTypeID=1Thu, 14 Nov 2019 23:52:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:eaf03d75-e8cf-4155-b6c6-8daa051ba6d0Zhenchuan<p>After struggling for quit a while, we found the solution. Besides the CONFIG_SECURE_BOOT=y configuration,&nbsp;the configure&nbsp;CONFIG_BOOTLOADER_MCUBOOT=y is also needed.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/219941?ContentTypeID=1Wed, 13 Nov 2019 18:55:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5be81fc5-0cf7-4a06-b3d8-81aaa548062cZhenchuan<p>This is the option I tried to enable:</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/secureboot.jpg" /></p> <p>I am using the commit&nbsp;bfe4c32e1bb14b47a667115eabcbea3f4dba4455</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/219888?ContentTypeID=1Wed, 13 Nov 2019 12:42:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ae249596-0219-4fb8-8d15-bf96d3caa346Sigurd<p>Hi,</p> [quote userid="82445" url="~/f/nordic-q-a/54324/how-to-debug-enabling-secure-bootloader"]enable secure bootloader option on project configure[/quote] <p>I don&#39;t see this config option. What is the name of the config?</p> <p>What tag/commit/branch are you using ?</p><div style="clear:both;"></div>