ImportError: /usr/lib/python2.7/site-packages/PyQt4/Qsci.so: undefined symbol: _ZTI11QsciPrinter

[qgib]

Author Name: Donovan Cameron (@saultdon)
Original Redmine Issue: 10836
Affected QGIS version: 2.4.0
Redmine category:processing/core
Assignee: Victor Olaya

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Looks like the processing plugin is broken in QGIS 2.4 when running QScintilla 2.8.3 on Linux.

There is an error on QGIS startup with the following error:
@couldn't load plugin 'processing' from ['/usr/share/qgis/python', '/home/saultdon/.qgis2/python', '/home/saultdon/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/home/saultdon', '/usr/share/qgis/python', '/usr/lib/python27.zip', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/lib/python2.7/site-packages', '/usr/lib/python2.7/site-packages/gtk-2.0', '/usr/lib/python2.7/site-packages/wx-3.0-gtk2']

Traceback (most recent call last):
File "/usr/share/qgis/python/qgis/utils.py", line 182, in loadPlugin
import(packageName)
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/init.py", line 29, in
from processing.tools.general import *
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/tools/general.py", line 29, in
from processing.core.Processing import Processing
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/core/Processing.py", line 56, in
from processing.algs.r.RAlgorithmProvider import RAlgorithmProvider
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/algs/r/RAlgorithmProvider.py", line 34, in
from processing.gui.EditScriptAction import EditScriptAction
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/gui/EditScriptAction.py", line 29, in
from processing.gui.ScriptEditorDialog import ScriptEditorDialog
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "/home/saultdon/.qgis2/python/plugins/processing/gui/ScriptEditorDialog.py", line 34, in
from PyQt4.Qsci import *
File "/usr/share/qgis/python/qgis/utils.py", line 454, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
ImportError: /usr/lib/python2.7/site-packages/PyQt4/Qsci.so: undefined symbol: _ZTI11QsciPrinter

Python version:
2.7.8 (default, Jul 1 2014, 17:30:21)
[GCC 4.9.0 20140604 (prerelease)]

QGIS version:
2.4.0-Chugiak Chugiak, 87e4b07

Python path: ['/usr/share/qgis/python', u'/home/saultdon/.qgis2/python', u'/home/saultdon/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/home/saultdon', '/usr/share/qgis/python', '/usr/lib/python27.zip', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/lib/python2.7/site-packages', '/usr/lib/python2.7/site-packages/gtk-2.0', '/usr/lib/python2.7/site-packages/wx-3.0-gtk2']@

[qgib]

Author Name: Donovan Cameron (@saultdon)

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Looks like qscintilla just needed to be recompiled against pyqt4 after I downgraded.

Closing as invalid =)

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• status_id was changed from Open to Closed

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• resolution was changed from to invalid

[qgib]

Author Name: Yacine Hmito (Yacine Hmito)

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I encounter exactly the same problem on a fresh Arch Linux system (when I say exactly, I mean by the letter).
I tried to downgrade pyqt4 but dependencies prevent me to do so (and qgis takes quite some time to download and compile). I do not understand what the problem is, how Donovan Cameron fixed it and how downgrading is supposed to fix it.
Any help is welcome !

[qgib]

Author Name: Donovan Cameron (@saultdon)

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Once you have a fully updated Arch system, it's safe to compile QGIS.

But for some reason, you still have to recompile qscintilla from the ABS. Then when re-installing qscintilla, you shouldn't get that error when you start QGIS.

[qgib]

Author Name: Yacine Hmito (Yacine Hmito)

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Donovan Cameron wrote:

Once you have a fully updated Arch system, it's safe to compile QGIS.

But for some reason, you still have to recompile qscintilla from the ABS. Then when re-installing qscintilla, you shouldn't get that error when you start QGIS.

I did this by typing yaourt -Sb qscintilla
It now works like a charm. Thank you !

[qgib]

Author Name: Yacine Hmito (Yacine Hmito)

---

Donovan Cameron wrote:

Once you have a fully updated Arch system, it's safe to compile QGIS.

But for some reason, you still have to recompile qscintilla from the ABS. Then when re-installing qscintilla, you shouldn't get that error when you start QGIS.

I did this by typing yaourt -Sb qscintilla
It now works like a charm. Thank you !

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• category_id was changed from 94 to Processing/Core