FreeCAD 18.1/Ubuntu 18.04.2. LTS: no workbenches after install

[Hannu]

I clean almost everything and still it doesn't start

Can you be more explicit on what you've tried or what commands you've run?

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!!! DELETED !!!! 

"upd" is a script that does ...
sudo apt-get autoremove
sudo apt-get autoclean
... after having done "$ARGUMENTS"

These are the steps I followed

Please note that just a few lines BELOW these there WERE the ACTUAL commands I used.... I'll go back an remove/DEL this fake-info... (DONE!)

[m.cavallerin]

Just a few steps forward.

I modified following libraries into my
.local/lib/python3.6/site-packages/PySide2/__init__.py
.local/lib/python3.6/site-packages/shiboken2/__init__.py
with the following editing on lines :

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#type.__signature__
type.__text_signature__

and it works but when I run the add-on manager, it complies:

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Running the Python command 'Std_AddonMgr' failed:
Traceback (most recent call last):
  File "/usr/share/freecad/Mod/AddonManager/AddonManagerGui.py", line 10, in Activated
    import AddonManager
  File "/usr/share/freecad/Mod/AddonManager/AddonManager.py", line 46, in <module>
    from PySide import QtCore, QtGui
  File "/usr/share/freecad/Ext/PySide/QtCore.py", line 1, in <module>
    from PySide2.QtCore import *

/usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.13' not found (required by /home/michele/.local/lib/python3.6/site-packages/PySide2/QtCore.abi3.so)

any help?

Enclosed the freeze for pip

[triplus]

any help?

Based on the info you have provided i would say that at some point in the past you pip installed PySide2, using their official wheel. Now that packages are interfering with your FreeCAD install or AppImage. My recommendation would be to remove the pip installed PySide2 and try to run FreeCAD again.

P.S. If you have installed the PySide2 as --user you can quickly confirm if this is the culprit by creating another user account and try to run FreeCAD from that user account.

[m.cavallerin]

Based on the info you have provided i would say that at some point in the past you pip installed PySide2, using their official wheel. Now that packages are interfering with your FreeCAD install or AppImage. My recommendation would be to remove the pip installed PySide2 and try to run FreeCAD again.

thank you very much!!!!!!
It worked..finally!!!!!

Regards!

[triplus]

thank you very much!!!!!!
It worked..finally!!!!!

Regards!

Good to hear that and you're welcome.

[pa2ees]

removing pyside2 that was installed with pip install --user works, unless you would like to use pyside2 in other programs. I was able to work around the problem by modifying /usr/lib/freecad/Ext/freecad/__init__.py to contain the following:

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import pkgutil
import sys, os

__path__ = pkgutil.extend_path(__path__, __name__)

newpath = []
for val in sys.path:
    if not os.getenv("HOME") + '/.local' in val:
        newpath.append(val)
sys.path = newpath

import FreeCAD as app

This should remove all user site-packages from the path, so that freecad doesn't get borked using them.

[mat]

Sorry to dig out an old thread but I have the exact same problem on freeCAD 18.4 (and ubuntu 18.04 LTS)

I confirmed the culprid was indeed an pyside2 incompatibility because when I uninstal it freeCAD works ; and when I install it I get the signature error as soon as I try to load a workbench.

As I need pyside2 for other things, I tried pa2ees' script modification (thx man). But it does not work for me, I still get the signature error.
Trying to execute the script in a python terminal I get :

>>> import pkgutil
>>> import sys, os
>>> __path__ = pkgutil.extend_path(__path__, __name__)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name '__path__' is not defined

I suppose it s not meant to be executed like that.

Anyone know what I could try?

[vince_isg]

removing pyside2 that was installed with pip install --user works, unless you would like to use pyside2 in other programs. I was able to work around the problem by modifying /usr/lib/freecad/Ext/freecad/__init__.py to contain the following:

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import pkgutil
import sys, os

__path__ = pkgutil.extend_path(__path__, __name__)

newpath = []
for val in sys.path:
    if not os.getenv("HOME") + '/.local' in val:
        newpath.append(val)
sys.path = newpath

import FreeCAD as app

This should remove all user site-packages from the path, so that freecad doesn't get borked using them.

Thank you so much for this! PySide2 was creating problems with FreeCAD. No I removed it and everything is back. Unfortunately all my PySide2 projects won't work now.... changing the __init__.py as suggested didn't work. Any other idea how to keep Pyside2 alongside FreeCAD?

[vocx]

...Any other idea how to keep Pyside2 alongside FreeCAD?

I haven't read the thread in detail but PySide2 works without problem with FreeCAD. FreeCAD uses PySide2 in fact. It is one of its requisites for installation, at least if you install in normal ways.

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Package: freecad-daily-python3    
Version: 0.19~pre2~202006050120~ubuntu18.04.1
State: installed (0.19~pre2~202006040256~ubuntu18.04.1), upgrade available (0.19~pre2~202006050120~ubuntu18.04.1)
Automatically installed: yes
Priority: optional
Section: science
Maintainer: Debian Science Maintainers <debian-science-maintainers@lists.alioth.debian.org>
Architecture: amd64
Uncompressed Size: 102 k
Depends: freecad-daily-common, python3-matplotlib, python3-pivy, python3-pyside2.qtcore, python3-pyside2.qtgui, python3-pyside2.qtuitools,
         python3-pyside2.qtsvg, python3-pyside2.qtwidgets, python3-pyside2.qtxml, python3-pyside2uic, libfreecad-daily-python3-0.19 (<
         0.19~pre2~202006050120~ubuntu18.04.1+1~), libfreecad-daily-python3-0.19 (>= 0.19~pre2~202006050120~ubuntu18.04.1), libc6 (>= 2.14),
         libgcc1 (>= 1:3.0), libpython3.6 (>= 3.6.5), libqt5core5a (>= 5.9.0~beta), libqt5gui5 (>= 5.7.0), libqt5widgets5 (>= 5.0.2),
         libstdc++6 (>= 5.2)

There are two versions of FreeCAD, one compiled against Python 2 and Qt4 (PySide), and one compiled for Python 3 and Qt5 (PySide2), you should be using the latter one, as Python 2 and Qt4 are both obsolete. Notice that if you install the Qt5 version, a special PySide module is installed in the installation directory of FreeCAD that points to PySide2. This is a trick so your scripts works with both Qt4 (PySide) and Qt5 (PySide2).

However, depending on your particular system, you may have conflicting versions of Qt5. This message in one of the posts above leads me to believe this is the case.

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/usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.13' not found (required by /home/michele/.local/lib/python3.6/site-packages/PySide2/QtCore.abi3.so)

If you are using Ubuntu, simply install FreeCAD from the PPA; it's the simplest way (Install on Linux). Or use the AppImage so that it doesn't cause conflict with the rest of your system. There is also an experimental Ubuntu Snap.

[triplus]

Didn't test it, but i guess one way would be to install PySide2 like this:

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pip3 install PySide2 --user --target path_to_custom_directory

As PySide2 won't be installed to any of the standard Python module search paths, FreeCAD won't find it and hence will not try to use it. In other projects you will need to make sure PIP installed PySide2 will be found, by using PYTHONPATH environment variable or by modifying sys.path.

P.S. Obligatory XKCD: