https://devzone.nordicsemi.com/f/nordic-q-a/26037/sometimes-main-function-never-gets-reached-need-help-badlyHi, I set a debug LED on as the very first thing I do in main. Randomly (sometimes 2 in a row, sometimes 1 in 100), sometimes my debug LED never comes on and no code is executed. I got some help from Laird in modifying my startup file, which shoulden-USTelligent Community 13Wed, 18 Oct 2017 10:52:58 GMThttps://devzone.nordicsemi.com/thread/102628?ContentTypeID=1Wed, 18 Oct 2017 10:52:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4acb076a-c804-40ec-8c12-081ce9df2663the_purple_pig<p>Laird Module. After a response from Nordic Support this morning, I added a 1 Meg pulldown on the /RESET line and this seems to have solved the problem. Doesn&#39;t seem like there&#39;s a firmware fix so I have to mod lots of product, but if it works, this is a huge amount of pressure off my shoulders!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/102627?ContentTypeID=1Wed, 18 Oct 2017 10:34:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3c6ffc5a-a58f-4c1a-b0d6-28aed90311a9bjorn-spockeli<p>Attaching a pulldown resistor to the SWDCLK is definitly not a good idea. Are you using a Laird Module or a custom board with a nRF51822? Which SDK version are you using?</p><div style="clear:both;"></div>