https://devzone.nordicsemi.com/f/nordic-q-a/112680/migration-to-v2-6-1-error-gatt_dm-c-96-undefined-reference-to-k_callocI&#39;m migrating from ncs v2.3.0 to ncs 2.6.1 in order to have the ram retetion working with the mcu boot. But after some modification on my board file using a nrf5340 I get this error that I don&#39;t get the meaning: Do you have any input on this en-USTelligent Community 13Tue, 02 Jul 2024 15:53:58 GMThttps://devzone.nordicsemi.com/thread/491907?ContentTypeID=1Tue, 02 Jul 2024 15:53:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c2bce9f3-4f48-4df0-bd4c-5723bc489e72Martdur<p>So answering my self if it can help :&nbsp;</p> <p>Introducing&nbsp;<pre class="ui-code" data-mode="text">CONFIG_HEAP_MEM_POOL_SIZE=256 </pre>&nbsp;makes it work.</p><div style="clear:both;"></div>