https://devzone.nordicsemi.com/f/nordic-q-a/127469/fota-download-fails-with-zephyr-signed-bin-no-app_update-bin-generated-nrf-connect-sdk-v3-1-1I am currently working on a FOTA implementation I am using nRF9160 DK with nRF Connect SDK v3.1.1 and the LwM2M client sample (/samples/cellular/lwm2m_client/). I am using LwM2M with the Leshan server over the CoAP protocol. I am facing an issue: theen-USTelligent Community 13Wed, 18 Mar 2026 11:48:17 GMThttps://devzone.nordicsemi.com/thread/563552?ContentTypeID=1Wed, 18 Mar 2026 11:48:17 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c04e6a69-0989-4246-b44e-200ed3a4e38b&#216;yvind<p>Hello,&nbsp;</p> [quote user=""]<span>I am facing an issue: the&nbsp;</span><strong><span>app_update.bin</span></strong><span>&nbsp;file is no longer generated</span>[/quote] <p>What is the reason for why this is no longer generated? Have you changed anything in your build settings?</p> [quote user=""]Here are the logs I am getting[/quote] <p>Based on the provided logs, are you actually connected?&nbsp;</p> <div> <div><code><span>#define</span><span> NRF_ECONNREFUSED </span><span>111</span><span> /**&lt; Connection refused */</span></code></div> <div><span>Is the URL correct? I.e.&nbsp;<code>Download url https://xxxxxx/zephyr.signed.bin</code></span></div> <div><span></span></div> <div><span>Where did you define the URL?&nbsp;</span></div> <div><span></span></div> <div><span>Kind regards,<br />Øyvind</span></div> </div><div style="clear:both;"></div>