https://devzone.nordicsemi.com/f/nordic-q-a/2660/fatal-error-0-src-ll_lm-s0-c-378Hey guys, We&#39;re seeing a problem with weird reboots after our system goes through a firmware update using the DFU. We are using the latest GCC for these builds (4.8 2014q1), and we get these fatal errors that cause a system reset. What&#39;s stranger stillen-USTelligent Community 13Mon, 02 Jun 2014 12:35:18 GMThttps://devzone.nordicsemi.com/thread/10463?ContentTypeID=1Mon, 02 Jun 2014 12:35:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb511ba7-5afd-4e4e-8df3-36c993f35708John<p>The &quot;src\ll_lm.s0.c&quot; is a file in the Soft Device Stack, so someone from Nordic who can see the source code would have to tell you the nature of the fault.</p> <p>However, I&#39;ve had assertions in my code that triggered a secondary assertion from the stack with a very similar fingerprint. I&#39;d set a break point in your assertion handler to see if catch the first assertion assuming that the one you are seeing is a secondary assertion.</p><div style="clear:both;"></div>