OSError: libpcanbasic.so library not found.

[EvgenyVainshtok]

Issue

This issue has never occurred on this computer. Recently the Ubuntu 22.04 got some software update, and I started getting this error.

    bus = PcanBus(channel, bitrate=bitrate, *args, **kwargs)
2023-04-27T18:23:26.060552780Z   File "/usr/local/lib/python3.10/dist-packages/can/interfaces/pcan/pcan.py", line 238, in __init__
2023-04-27T18:23:26.060556518Z     self.m_objPCANBasic = PCANBasic()
2023-04-27T18:23:26.060562525Z   File "/usr/local/lib/python3.10/dist-packages/can/interfaces/pcan/basic.py", line 703, in __init__
2023-04-27T18:23:26.060566191Z     raise OSError(f"{lib_name} library not found.")
2023-04-27T18:23:26.060569707Z OSError: libpcanbasic.so library not found.

The dmesg | grep pcan is showing

dmesg | grep pcan
[   42.903509] pcan: loading out-of-tree module taints kernel.
[   42.903605] pcan: module verification failed: signature and/or required key missing - tainting kernel
[   42.905658] pcan: Release_20220929_n (le)
[   42.905660] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[   42.906882] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[   42.956902] pcan: - usb device minor 32 found
[   42.956936] usbcore: registered new interface driver pcan
[   42.956939] pcan: major 510.
[84642.493768] usbcore: deregistering interface driver pcan
[84642.703738] pcan: removed.
[84643.824053] pcan: Release_20220929_n (le)
[84643.824055] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[84643.825079] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[84643.875042] pcan: - usb device minor 32 found
[84643.875064] usbcore: registered new interface driver pcan
[84643.875067] pcan: major 510.
[269713.546810] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[274770.456047] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[276786.336181] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[279648.442150] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[284490.616062] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[350706.762140] pcan: PCAN-USB CAN1: controller internal Rx queue overflow: possible loss of msgs(s)
[351724.167914] pcan: PCAN-USB CAN1: msg[type=1 id=7dfh l=8] lost: err -28 rxqsize=2000
[420528.084236] usbcore: deregistering interface driver pcan
[420528.291442] pcan: removed.
[420529.432408] pcan: Release_20220929_n (le)
[420529.432411] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[420529.433578] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[420529.483647] pcan: - usb device minor 32 found
[420529.483687] usbcore: registered new interface driver pcan
[420529.483690] pcan: major 510.
[444127.860368] usbcore: deregistering interface driver pcan
[444128.069315] pcan: removed.
[444129.183187] pcan: Release_20220929_n (le)
[444129.183190] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[444129.184379] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[444129.234481] pcan: - usb device minor 32 found
[444129.234502] usbcore: registered new interface driver pcan
[444129.234504] pcan: major 510.
[520729.723509] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[520729.774242] pcan: - usb device minor 32 found
[615228.586721] usbcore: deregistering interface driver pcan
[615228.794029] pcan: removed.
[615230.294585] pcan: Release_20220929_n (le)
[615230.294591] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[615230.295921] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[615230.346211] pcan: - usb device minor 32 found
[615230.346233] usbcore: registered new interface driver pcan
[615230.346236] pcan: major 510.
[857344.525134] usbcore: deregistering interface driver pcan
[857344.733634] pcan: removed.
[857345.898112] pcan: Release_20220929_n (le)
[857345.898115] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[857345.899161] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[857345.949182] pcan: - usb device minor 32 found
[857345.949218] usbcore: registered new interface driver pcan
[857345.949221] pcan: major 510.
[1113943.896306] usbcore: deregistering interface driver pcan
[1113944.103286] pcan: removed.
[1113945.258045] pcan: Release_20220929_n (le)
[1113945.258048] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[1113945.259572] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[1113945.309775] pcan: - usb device minor 32 found
[1113945.309794] usbcore: registered new interface driver pcan
[1113945.309797] pcan: major 510.
[1221008.801616] usbcore: deregistering interface driver pcan
[1221009.010941] pcan: removed.
[1221010.476427] pcan: Release_20220929_n (le)
[1221010.476430] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[1221010.477508] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[1221010.527585] pcan: - usb device minor 32 found
[1221010.527604] usbcore: registered new interface driver pcan
[1221010.527607] pcan: major 510.
[1221112.549686] usbcore: deregistering interface driver pcan
[1221112.754620] pcan: removed.
[1221114.079729] pcan: Release_20220929_n (le)
[1221114.079736] pcan: driver config [mod] [isa] [pci] [pec] [usb] 
[1221114.081090] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[1221114.131368] pcan: - usb device minor 32 found
[1221114.131393] usbcore: registered new interface driver pcan
[1221114.131397] pcan: major 510.
[1223011.077001] pcan: err -71 when reading: is PCAN-USB usb cable disconnected?
[1223015.606184] pcan 1-4.1:1.0: PCAN-USB fw v8.4.0
[1223015.657144] pcan: - usb device minor 32 found

Name: python-can
Version: 4.2.0
Summary: Controller Area Network interface module for Python
Home-page: https://github.com/hardbyte/python-can
Author: python-can contributors
Author-email: 
License: LGPL v3
Location: /usr/local/lib/python3.10/dist-packages
Requires: msgpack, packaging, setuptools, typing-extensions, wrapt
Required-by: cantools, keeptruckin

Has anyone seen experienced anything like that recently?

[zariiii9003]

Try this PR: #1580
I'll create a bugfix release if it works for you.

[zariiii9003]

Check v4.2.1