Could not fetch memory size of target devkit: Error: Error occured when get library info. Errorcode: CouldNotOpenDevice (0x4) Lowlevel error: Unknown value (ffffff5e)

[christian11]

I have seen this question asked a few times--but every thread seems to have no concrete answer.

I have uninstalled and reinstalled all JLINK drivers.

But still get the errors.

I have nrf52840 dk and am using windows 10

[Albrecht Markus Schellenberger]

Hello Christian,

what is the path to your J-Link installation?

Regards,

Markus

[christian11]

It is in a folder on my computer's onedrive.

Does it need to be on the C drive?

[Albrecht Markus Schellenberger]

Please use the default path that is suggested during the installation.

Regards,

Markus

[christian11]

Reinstalled in the default path on the C drive.

Same issue appears.

[Albrecht Markus Schellenberger]

Thanks for the feedback, Christian!

The root cause here could be a lot of different things, so we just have to go through it step by step.

What is the installation path of the nRF Command Line Tools and the nRF Connect?

Regards,

Markus