nRF52840 async task failure when programming some boardshttps://test-devzone.nordicsemi.com/f/nordic-q-a/88249/nrf52840-async-task-failure-when-programming-some-boardsHi, we are observing an interesting range of problems on nRF52840 devices we are assembling, where some percentage of them fail with the following error. While ti may be possible these are assembly or soldering issues, no amount of rework appears toen-USTelligent Community 13 Non-ProductionMon, 30 May 2022 09:59:19 GMTRE: nRF52840 async task failure when programming some boardshttps://test-devzone.nordicsemi.com/thread/369935?ContentTypeID=1Mon, 30 May 2022 09:59:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a5bfed6c-2dd2-4238-9a60-70353fd5eaa8user2111<p>Can you make sure you have downloaded and using the latest nrfjprog:<br /><a href="https://www.nordicsemi.com/Products/Development-tools/nrf-command-line-tools/download">https://www.nordicsemi.com/Products/Development-tools/nrf-command-line-tools/download</a>&nbsp;</p> <p>You can type nrfjprog --version to list version numbers and also the show me the result of the nrfjprog programming command afterwards.</p> <p>Which SEGGER j-link programmer are you using btw?</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>RE: nRF52840 async task failure when programming some boardshttps://test-devzone.nordicsemi.com/thread/369645?ContentTypeID=1Thu, 26 May 2022 05:41:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:77bf584e-4e3f-41be-8285-0a69838e0e2auser81299<p><a href="https://test-devzone.nordicsemi.com/members/user36968">user36968</a> we observe this with nfrjprog as well.</p><div style="clear:both;"></div>RE: nRF52840 async task failure when programming some boardshttps://test-devzone.nordicsemi.com/thread/369589?ContentTypeID=1Wed, 25 May 2022 14:55:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8461f07d-be7b-4031-8027-1e4500e8bdd6user2111<p>Looks like the same problem as here:&nbsp;<a href="https://test-devzone.nordicsemi.com/f/nordic-q-a/87881/sniffer-firmware-write-fails">https://devzone.nordicsemi.com/f/nordic-q-a/87881/sniffer-firmware-write-fails</a>&nbsp;</p> <p>While waiting for a fix, please try the workaround suggested: &quot;<span>Are you able to program it with&nbsp;</span><a href="https://infocenter.nordicsemi.com/topic/ug_nrf_cltools/UG/cltools/nrf_nrfjprogexe.html">nrfjprog</a><span>&nbsp;in the meantime?</span>&quot;&nbsp;</p> <p>Kenneth</p><div style="clear:both;"></div>