Can't ota-dfu by NRF toolbox

Can't ota-dfu by NRF toolboxhttps://devzone.nordicsemi.com/f/nordic-q-a/10962/can-t-ota-dfu-by-nrf-toolboxMy sdk is 8.1.1, and use dual_bank_ble_s110. I can update application by doggle well, but can't update the application by nrf toolbox and nrf MCP. What should I do? The made this change in bootloader_settings.c: Change these codes: uint8_t m_boot_settingsen-USTelligent Community 13Mon, 21 Dec 2015 13:41:55 GMTRE: Can't ota-dfu by NRF toolboxhttps://devzone.nordicsemi.com/thread/41003?ContentTypeID=1Mon, 21 Dec 2015 13:41:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0ad83a6b-1e4d-48f6-b665-1ed3b66435e9Hung Bui<p>Hi Mansfield,</p> <p>Which issue do you have ? You can find the log in the nRF MCP, you can also capture a <a href="https://www.nordicsemi.com/eng/Products/Bluetooth-Smart-Bluetooth-low-energy/nRF-Sniffer/(language)/eng-GB">sniffer trace</a>.</p> <p>Have you checked if the device is bonded with the phone ?</p> <p>If you don't modify the source code, would the issue occurs ?</p><div style="clear:both;"></div>