[mcstas-users] McStas 3.0 - running mcgui (WSL 1, Ubuntu 20.04 LTS)

[Peter Kjær Willendrup]

Hello again Michał,


I successfully reproduced your issue in a virtual machine, and also found a series of workarounds.

1) (As root) I commented out lines 26-28 in /usr/bin/mcgui

2) Next, a problem loading libQt5Core.so.5 appeared:

  Traceback (most recent call last):
    File "/usr/share/mcstas/3.0/tools/Python/mcgui/mcgui.py", line 14, in <module>
      from PyQt5 import QtCore, QtWidgets
  ImportError: libQt5Core.so.5: cannot open shared object file: No such file or directory

  - But in fact the file was present in /usr/lib/x86_64-linux-gnu/ ?! This turned out to be an issue with the kernel shipped
    with Ubuntu 20.04 on WSL, I followed the recommendation from this page:
    https://askubuntu.com/questions/1034313/ubuntu-18-4-libqt5core-so-5-cannot-open-shared-object-file-no-such-file-or-dir

    and ran the command

sudo strip --remove-section=.note.ABI-tag /usr/lib/x86_64-linux-gnu/libQt5Core.so.5

- This all together allowed mcgui to run, see attachment.


Best
Peter


[cid:E6578628-E379-4EA8-BE1C-EB49FA104559]

On 6 Feb 2021, at 20.50, Peter Willendrup <pwillendrup at gmail.com<mailto:pwillendrup at gmail.com>> wrote:

Dear Michał.


Judging from the last line of the error-message, it looks like the shell-script could be picking up a path containing a space, i.e. Program Files?

Could you try doing e.g. a cd /tmp before attempting to start mcgui to see if this changes anything?

Alternatively you should be able to remove the lines 26-28 in the mcgui shell-script, i.e. replace

else
    export PATH=$LIB/../miniconda3/bin:$PATH
    export LD_LIBRARY_PATH=$LIB/../miniconda3/lib:$LD_LIBRARY_PATH
fi

by

fi

only?


Hope this helps,

Peter

On 6 Feb 2021, at 18.39, Dembski-Villalta, Michal Piotr <michal.dembski-villalta at tum.de<mailto:michal.dembski-villalta at tum.de>> wrote:

Dear McStas users,

I’m writing with a problem, I believe similar to a recent issue (already resolved here https://mailman2.mcstas.org/pipermail/mcstas-users/2021q1/001391.html), however that solution did not help me. After installing McStas 3.0 on Windows 10 (WSL1, Ubuntu 20.04 LTS) I get the following error:

.../McStas$ mcgui
/usr/share/mcstas/3.0/bin/mcgui: 14: [[: not found
/usr/share/mcstas/3.0/bin/mcgui: 27: export:
Files/WindowsApps/CanonicalGroupLimited.Ubuntu20.04onWindows_2004.2020.812.0_x64__79rhkp1fndgsc:/mnt/c/Program: bad variable name

I would be grateful for any help with it.
Kindly,
Michał Dembski-Villalta

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Peter Kjær Willendrup
Forskningsingeniør, Specialkonsulent
Næstformand for DTU Fysik LSU

DTU Physics


[cid:b6339554-7f28-441d-9f31-5944f811397c at win.dtu.dk]


Technical University of Denmark


[cid:e108e480-fcab-46e2-9531-b38165079572 at win.dtu.dk]



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