https://devzone.nordicsemi.com/f/nordic-q-a/92353/how-to-edit-ram-flash-placement-in-nrf-connect-sdkHi, Iam getting this error when i declare the following: uint8_t tx_buffer[0x2000] _attribute_((section(&quot;.spim3_tx_buffer&quot;))); When using nRF5 SDK i could able to edit the flash_placement.xml as : &lt;ProgramSection alignment=&quot;4&quot; load=&quot;No&quot; size=en-USTelligent Community 13Fri, 30 Sep 2022 19:23:09 GMThttps://devzone.nordicsemi.com/thread/388834?ContentTypeID=1Fri, 30 Sep 2022 19:23:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dcc1bacc-d78b-4801-815a-f5ebbfa24796Raoul<p>Hi Vignesh,</p> <p>Please take a look at <a href="https://devzone.nordicsemi.com/support-private/support/269376#permalink=659441">this answer</a>.</p> <p>In short:</p> <p>In the nRF Connect SDK, flash partitions are by default defined in the devicetree. However, if you are working on a <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_multi_image.html">multi-image</a> application (which will always be the case when using MCUboot), the DTS is ignored and partitions are instead set through the <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html">Partition Manager</a>, based on pm.yml files that you edit and put in your application folder.</p> <p>Hope that helps!</p> <p>Best regards,</p> <p>Raoul</p><div style="clear:both;"></div>