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]

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.