nrfjprog no debugger connected

[gaminn]

I get "ERROR: There is no debugger connected to the PC with the given serial number." when I run e.g. nrfjprog --eraseall on command line.

Programming/debugging using VisualGDB or nRFgo Studio works

nrfjprog version: 9.8.1
JLinkARM.dll version: 6.12a

Windows 10

How to erase/program nrf52832 using nrfjprog on command line?

[wlgrd]

It's very weird that it gives the extra "with the given serial number". For me:

nrfjprog --eraseall
ERROR: There is no debugger connected to the PC.

Also, try doing nrfjprog --ids, which will yield something like this:

nrfjprog --ids
50107526

Then, you can do e.g

nrfjprog --eraseall --snr 50107526

If I do (in my specific case) erase with the wrong serial number provided, I get:

nrfjprog --eraseall --snr 50101010
ERROR: There is no debugger connected to the PC with the given serial number.

Hence, it looks like you are providing the serial number in some way or another. 

[gaminn]

I'm not providing the serial number explicitly. When I provide serial number by --snr xxxxxxx I get the same "There is no debugger connected to the PC with the given serial number.".That is weird.

[wlgrd]

Anything changed in your C:\Program Files\Nordic Semiconductor\nrf5x\bin\nrfjprog.ini ? 

[gaminn]

Nothing. I only think that I was forced to update software in this folder several months ago in order to be able to develop firmware for nrf52832. In the past I was developing only for nrf51 and I was able to use nrfjprog without any issue. Now nrfjprog doesn't work even for our old device with nrf51. However, I can't remember what version of nrfjprog I used that time.

[wlgrd]

Which version are you using now?

[gaminn]

nrfjprog version: 9.8.1, JLinkARM.dll version: 6.12a, it is in my initial post

[wlgrd]

Current version is 6.44 something. Could you try updating your jlink-drivers?

[gaminn]

"C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe" -v
nrfjprog version: 9.8.1
JLinkARM.dll version: 6.44g

"C:\Program Files (x86)\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe" --eraseall
ERROR: There is no debugger connected to the PC with the given serial number.

[wlgrd]

Doesn't make any sense to me, this. I have the same versions here and it's behaving differently. What does --ids yield?