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

[jjwikner]

Hello,

Ubuntu 20.10, nRfConnect v3.6.1, Programmer 1.4.8.  Running appimage. 

I get: 

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

Jlink mounted.

Works fine on Windows 10.

Regards

[Amanda Hsieh]

Hi, 

Which board are you using? Custom board or DK?

What voltage of VTref does the J-Link Commander get? Could you make sure it is 3.3v. 

Could it help by runing nrfjprog --recover? If not, please provide the log of nrfjprog --recover --log. 

-Amanda H.

[jjwikner]

It's a Nordic board, so not custom. 

Where do I find the VTref?

I guess I cannot access nrfjprog --recover since I have an AppImage? Do you suggest to download some other package?

[Amanda Hsieh]

Hi, 

I see. nRfConnect v3.6.1 is updated to pc-nrfjprog-js v1.7.6, including bundled nrfjprog v10.12.1 and JLink 6.88a. Are you able to run nrfjprog -v to get the nrfjprog version? If it cannot execute, you might need to install nRF-Command-Line-Tools/Download

nrfjprog -v
nrfjprog version: 10.12.1
JLinkARM.dll version: 6.88a

If you still have the issue, could you upload the log of nRfConnect v3.6.1, Programmer?

-Amanda H.

[jjwikner]

Hello Amanda,

thanks for the feedback. I installed the command-line tools and ran the recover. Now it works. Thanks!

[Amanda Hsieh]

Glad to know it can work. 

-Amanda H.