https://devzone.nordicsemi.com/f/nordic-q-a/80963/mqtt-connect-fail-enomemHello, My application is a modified version of MQTT_simple. I have moved all the code inside while(true) to a thread and set username as a device token. The error -12 ENOMEM come from a file mqtt_encoder.c line 366 err_code = pack_utf8_str(clienten-USTelligent Community 13Mon, 25 Oct 2021 06:46:29 GMThttps://devzone.nordicsemi.com/thread/335622?ContentTypeID=1Mon, 25 Oct 2021 06:46:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0d4d329d-11b7-4736-8268-1dd35017efbckclauah<p>I have finally found the reason that causes ENOMEM which are not related to MQTT.</p><div style="clear:both;"></div>