Error: Flash Download failed - "Cortex-M4"

[Sunil@123]

Hello Everyone,

I am using nrf52 dk development board. I'm  having a problem  when  I load my ble_app_uart example . I am getting an error message  Error: Flash Download failed  -  "Cortex-M4"   . I am using SDK17 version. I have done the below setting. please help me out to solve this issue .

[awneil]

Please post (copy & paste) what appears in the 'Output' window when you attempt programming.

Can you download successfully using the Segger and/or Nordic utilities?

[Sunil@123]

[Kenneth]

Can you try install latest nRF command line tools, then run from command line:

'nrfjprog --recover' or 'nrfjprog --eraseall'

[Sunil@123]

is there any other solution. 

[Kenneth]

If you click on the Flash Download tab in one of your screenshots, I believe there may be an option to erase all flash before programming also.

I do believe the problem you experience may occur if you swap to a project with a different softdevice, so as long as you stay on the same softdevice release you should be good.

[Sunil@123]

there is a option --> erase

when i erase and again load it shows same error 

[Sunil@123]

there is one more problem 

while i was compile the ble_app_uart example i am getting an error - cannot create command input file '..\..\..\..\..\..\components\softdevice\s132\hex\main.__i'

[Kenneth]

The softdevices comes precompiled, and should only be flashed. Have you by accident tried to compile the softdevice? Unfortunately this won't work, and likely the softdevice hex file is erased in the process, you may need to get the files in the \s132\ folder from the nRF5 SDK zip file again.

Example:

If "nRF52832_xxaa" is chosen you can compile and flash the application.
If "softdevice" is chosen you can only flash, this will program the BLE softdevice stack that is used by the application.

Kenneth