https://devzone.nordicsemi.com/f/nordic-q-a/29280/app-won-t-start-after-writing-to-flash-with-fdsHello, I am trying to figure out my problem related to this question . I am writing just a couple of words to flash with FDS. The problem is that after writing, the device doesn&#39;t run anymore when reset. If not reset, it keeps running normally afteren-USTelligent Community 13Wed, 10 Jan 2018 09:37:06 GMThttps://devzone.nordicsemi.com/thread/116456?ContentTypeID=1Wed, 10 Jan 2018 09:37:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:32b557d5-0af0-4971-97bf-d882af6913b7Petter Myhre<p>Thanks for sharing.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/116455?ContentTypeID=1Tue, 09 Jan 2018 19:50:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3799934-4cd9-4b25-b5cd-8e7d6bdd726eAndy<p>Apparently, there was a hardfault being raised due to some optimization issue. I lowered the optimization settings from -o3 to none and the issue went away.</p> <p>Then I kept implementing the feature I wanted and when I re-enabled the optimization the error didn&#39;t show up anymore. Sadly, I&#39;m not able to reproduce the issue anymore (for debugging purposes).</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/116454?ContentTypeID=1Tue, 09 Jan 2018 10:27:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:73fc5dc7-00af-44ed-95f5-968896738d74Petter Myhre<p>Strange. Does this happen if you try the SDK examples using FDS as well?</p><div style="clear:both;"></div>