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I get this error; any comments

Couldn't load PyQGIS. Python support will be disabled.

Traceback (most recent call last): File "", line 1, in ImportError: /usr/lib/python2.7/dist-packages/qgis/core.so: undefined symbol: _ZN28QgsCoordinateReferenceSystem19createFromUserInputE7QString

Python version: 2.7.3 (default, Apr 20 2012, 23:06:40) [GCC 4.6.3]

QGIS version: 1.8.0-Lisboa 'Lisboa', exported

Python path: ['/usr/share/qgis/python', '/home/norm/.qgis//python', '/home/norm/.qgis//python/plugins', '/usr/share/qgis/python/plugins', '/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/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PIL', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/ubuntuone-client', '/usr/lib/python2.7/dist-packages/ubuntuone-control-panel', '/usr/lib/python2.7/dist-packages/ubuntuone-couch', '/usr/lib/python2.7/dist-packages/ubuntuone-installer', '/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol', '/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode']

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1 Answer 1

Reset to default
4 
$ c++filt _ZN28QgsCoordinateReferenceSystem19createFromUserInputE7QString
QgsCoordinateReferenceSystem::createFromUserInput(QString)

QgsCoordinateReferenceSystem::createFromUserInput(QString) is new in 1.8. Are you sure your core.so is linked to the current library? Check with ldd /usr/lib/python2.7/dist-packages/qgis/core.so | grep qgis_core.

Maybe you still have an old version of the libraries installed (possibly from the former 1.8 branch).

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  • libqgis_core.so.1.8.0 => /usr/lib/libqgis_core.so.1.8.0 (0xb6d94000)
    – Norm Trowell
    Jun 21, 2012 at 1:04
  • Ok, so where did that library come from? Did you build yourself or installed a package? Did you install/build the python extension from the same source?
    – jef
    Jun 21, 2012 at 9:02
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    I just installed from the QGIS page following instructions What commands would you suggest to completely delete all qgis from my drive and then I could start over
    – Norm Trowell
    Jun 21, 2012 at 11:53
  • To see which packages are installed you could run: dpkg -l | grep qgis BTW which distribution are you using? To remove all QGIS packages run: apt-get remove --purge ".*qgis.*"
    – jef
    Jun 21, 2012 at 14:43
  • Thanks very much for all your help Jef. This is what I got back; have a 1.9 reference which is probably source of problems
    – Norm Trowell
    Jun 21, 2012 at 23:59

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