nRF51822 - fail to upload device firmware through BLE bootloader. ( used to be good)https://devzone.nordicsemi.com/f/nordic-q-a/26694/nrf51822---fail-to-upload-device-firmware-through-ble-bootloader-used-to-be-goodHI, I am using nRF51822 S130, SDK12.3.0 I created private key for application code and public key for bootloader. Just few days ago, the zip file can upload to the device ( when device in DFU mode ) through nRF toolbox V2.5.0 But somehow starten-USTelligent Community 13Wed, 08 Nov 2017 18:46:40 GMTRE: nRF51822 - fail to upload device firmware through BLE bootloader. ( used to be good)https://devzone.nordicsemi.com/thread/104989?ContentTypeID=1Wed, 08 Nov 2017 18:46:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cb85c6ab-8faf-4bdd-99c6-690f5f1321ecDYNAMICTOYS<p>Hi Hung,</p> <p>I just found there are latest version 2.5.1 nRF Toolbox and it had this issue fixed.</p><div style="clear:both;"></div>RE: nRF51822 - fail to upload device firmware through BLE bootloader. ( used to be good)https://devzone.nordicsemi.com/thread/104990?ContentTypeID=1Wed, 08 Nov 2017 16:04:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f1c3e3e6-5c9f-4119-90ec-092f3c20de2cHung Bui<p>Could you take a screenshot of the popup ? Could you check the toolbox version ? Have you tried to use nRFConnect instead of nRFToolbox ?</p><div style="clear:both;"></div>