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Error to start Power Profiler App : Probing Device

Hi,

I have Power Profiler Board. It works on Windows Desktop.

But no on Ubuntu Machine:

Ubuntu 16.04,

nRFConnect 3.3.0 and nRFConnect 3.3.1 AppImage

Power Profile Version 2.3.1

//////////////////////////////////////// System Report:

# nRFConnect System Report - 2020-04-09T13-49-26.846Z

- System: Dell Inc. Precision 7520
- BIOS: Dell Inc. 1.5.1
- CPU: 1 x IntelRegistered CoreTm i7-7700HQ 2.80 GHz 8 cores (4 physical)
- Memory: 4.5 GB free of 7.6 GB total
- Filesystem: /dev/nvme0n1p3 (ext4) 215.7 GB 78.3% used

- OS: Ubuntu (16.04.6 LTS) linux x64

- Versions
- kernel: 4.4.0-112-generic
- git: 2.7.4
- node: 12.0.0
- python: 2.7.12
- python3: 3.5.2

////////////////////////////

Tool to measure current for nRF5x applications

Version: 2.3.1
Official: true
Supported engines: nRF Connect ^3.3.0
Current engine: nRF Connect 3.3.1
App directory: /home/dzhou/.nrfconnect-apps/node_modules/pc-nrfconnect-ppk

//////////////////////////

Error while probing devices: Error occured when get serial numbers. Errorcode: CouldNotCallFunction (0x9) Lowlevel error: INVALID_OPERATION (fffffffe)

Please help,

David

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