DFU Error : remote dfu not supported

[RK]

hi,

i am using nrf51822 s110 sdv 7.1.0,when i upgrade the soft device, application and boot loader(create .zip) using the nRF toolbox application. application shows me error to "REMORT DFU NOT SUPPORTED"

is it possible to switch soft device using OTA ?

[RK]

I am using the s110 SDK 7.1.0 and my device have older version SDK s110 6.2.1. i wan to switch the SDK s110 6.2.1 to SDK s110 7.1.0.

exactly remote dfu not supported error happen, when i upgrade the new firmware(boot loader, soft device, and application) on new board at first time. new board have in build SDK s110 6.2.1. Once erase on board firmware and upgrade SDK s110 7.1.0, boot loader and application using nRF_tool and SWD header connection.after that i can upgrade firmware(SDK s110 7.1.0,boot loader, application)any time.

zip file is create successful using this command :
nrfutil.exe dfu genpkg --application "app_path\app.hex" --application-version 0xffffffff --bootloader "bootloade_path\bootloader.hex" --dev-type 0xffff --dfu-ver 0.5 --sd-req 0x005A --softdevice "softdevice_path\s110_nrf51822_7.1.0_softdevice.hex" D:\BLE_device.zip

1. It is possible board designer provide any security for DFU process ya i miss something?
2. any mismatch in .zip file creation?