[Qgis-user] help, problem with python and qgis

[Giacomo Fontanelli]

Hello everybody

I use Qgis 2.3 nightly-build on ubuntu 14.04.
Today I started the software and i received this message

 File "", line 1, in File
"/usr/lib/python2.7/dist-packages/qgis/__init__.py",
                 line 35, in from qgis.core import QgsFeature, QgsGeometry
ImportError: /usr/lib/python2.7/dist-packages/qgis/core.so: undefined
symbol:
_ZN21QgsSymbolLayerV2Utils20pixelSizeScaleFactorERK16QgsRenderContextN11QgsSymbolV210OutputUnitE.

I tried to update and upgrade, but without success.
How can I solve it.

Thank you very much.
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