Unknown device error 9 in nrf programmer

[Khodidas11]

Hi,

We designed our custom board using nrf54l05, and tried to flash it using segger J-lInk as well as using nrf54L15-DK Debuger out port using nrf connect Programmer utility. we checked and verified connections which are OK, 
but facing issue of error code 9, UNKNOWN Device.

Please Help

Regards

Khodidas

[Jared]

Hi,

Can you try to use nRF Command line Tools and do a recover? If it fails, can you add the --log argument and share the log with us?

Make sure that the device is powered when doing this.

nrfjprog --recover --log

best regards

Jared

[Khodidas11]

Already tried this , error throws. It was using nrf54l15-Dk external debugger output port

[Jared]

Hi,

So there was some miscommunication in my previous reply, let me fix that:

nRF Command Line tools is not longer supported for these devices. Use nrfutil device v2.8.8 or later instead. You can download that here. 

See PCN 219 for more information on this.

best regards

Jared 

[Khodidas11]

Still issue same, i have updated segger Jlink , and having nrfutil V2.8.8 already installed. Tried using nrfconnect programmer utility gives error 9 UNKNOWN device