https://devzone.nordicsemi.com/f/nordic-q-a/61215/nrf52840-dk-hardfaultReceived our 52840 DK, loaded, via nRF Go Studio, s140_nrf52_7.0.1_softdevice.hex. Loaded, via IAR Workbench, ble_app_blinky_pca10056a_s140. I clicked to go button and whamo, right to Hardfault exception. Call stack shows main-&gt;ble_stack_init-&gt;nrf_sdh_enable_requesten-USTelligent Community 13Thu, 14 May 2020 15:46:28 GMThttps://devzone.nordicsemi.com/thread/250023?ContentTypeID=1Thu, 14 May 2020 15:46:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:71083186-9d60-41f4-a52e-508c7d895634mac<p>ahhhh, rookie mistake, I apologize</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/249176?ContentTypeID=1Mon, 11 May 2020 11:46:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d22af4c7-4b70-4bb4-9910-3f45b3a244a7Edvin<p>Hello,</p> <p>If the ble_app_blinky_pca10056_s140 works with the s132 softdevice, you are not using the combination of project and softdevice that you think you are using.</p> <p>Can you show me some screenshots of how you program the bootloader and what your IAR setup looks like? Are you sure you set the ble_app_blinky_pca10056_s140 as the active project before you flash it?</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-992155bd619641588bcfc1a32405d248/pastedimage1589197564389v1.png" alt=" " /></p> <p>BR,</p> <p>Edvin</p><div style="clear:both;"></div>