NRFJPROG DLL: -254 INTERNAL_ERROR about pyrtt-viewer

[thomasstenersen]

Which versions of JLink do you have?

nrfjprog --version
pip show pynrfjprog

[nkernytskyy]

nrfjprog --version
ERROR: An internal error has occurred, please try again.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

pip show pynrfjprog
Name: pynrfjprog
Version: 10.15.1
Summary: A simple Python interface for the nrfjprog functionality
Home-page: http://www.nordicsemi.com/
Author: Nordic Semiconductor ASA
Author-email: [email protected]
License: Nordic 5-clause License
Location: /home/kubuntu/.local/lib/python3.9/site-packages
Requires: future
Required-by: pyrtt-viewer

[nkernytskyy]

nrfjprog was installed from this package: nrf-command-line-tools-10.15.1_linux-amd64

[nkernytskyy]

sudo nrfjprog --log
ERROR: [ Client] - Worker process is dead, cannot execute command.
ERROR: An internal error has occurred, please try again.

[nkernytskyy]

SEGGER J-Link Commander V7.58d (Compiled Dec 2 2021 15:27:09)
DLL version V7.58d, compiled Dec 2 2021 15:26:53

[thomasstenersen]

Looks like there's a problem with your nrfjprog installation. You might want to seek more help at devzone.nordicsemi.com.

[nkernytskyy]

Thank you.

[mped-oticon]

export LANG=C worked in my case.

strace showed that worker process jlinkarm_nrf_worker_linux tried to load en_US.UTF-8 without these being installed on the machine we use for regression.