https://devzone.nordicsemi.com/f/nordic-q-a/87280/troubleshooting-nrf9160---bus-fault---mqttHello, I&#39;m having some issues troubleshooting, my knowledge is limited on how to trace down where the error occurs. Se logs below -&gt; Any tips on how to find out where is error occurs? Regards, Daviden-USTelligent Community 13Tue, 26 Apr 2022 10:45:12 GMThttps://devzone.nordicsemi.com/thread/364907?ContentTypeID=1Tue, 26 Apr 2022 10:45:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:10110397-6217-4a57-bad4-1ad609903194helsing<p>Hi David,</p> <p>You could do a reverse lookup of the PC(Program Counter) and LR(Link Register). This should tell you where in the code the error comes from. Here is one way to look up:</p> <ol> <li>For example open Toolchain Manager and open command prompt:<br /><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1650969380308v1.png" alt=" " /><code></code></li> <li>Navigate to your project folder.</li> <li> <p>Run this command: </p> <p><code>arm-none-eabi-addr2line -e build/zephyr/zephyr.elf 0xFAULTING_ADDRESS</code><br /><br />where you replace&nbsp;<code>0xFAULTING_ADDRESS</code> with <code>0x353a2</code>.</p> </li> <li>Run the same command again using LR = <code>0x000292e9.</code></li> </ol> <p>Please let us know how it goes.</p> <p>Best regards,</p> <p>Håkon</p><div style="clear:both;"></div>