Error when i try to erase NRF52

[F.lemke]

Hi everyone,

I'm totally newbie, and was following the tutorial devzone.nordicsemi.com/.../. (I have two board, PCA10028 with a nRF51 and PCA10040 with a nRF52)

and i try to run the blinky code example with the PCA10028, it's working fine. but not with the PCA10040.

I try to erase the device by using this command : nrfjprog --family nRF52 --eraseall --log and here is the "unexpected issue" :( I sent you the log.log file

and the cmd error :

thanks for your support

[Sigurd]

What J-Link version are you using? You can check with nrfjprog -v

Have you tried connecting with J-Link Commander? Does it say something like:

Connecting to J-Link via USB...O.K.
Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 14 2016 16:58:29
Hardware version: V1.00
S/N: 683379432
VTref = 3.300V

Could you try with a new USB cable? and maybe on another computer?

If this is still not working, you could try to reflash the J-Link with nRF5x-OB-JLink-IF found here (drag and drop into removable drive)