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Traceback (most recent call last): File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/doVectorGrid.py", line 269, in outFile ( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self ) File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/ftools_utils.py", line 285, in saveDialog fileDialog = QgsEncodingFileDialog( parent, "Save output shapefile", dirName, filtering, encode ) TypeError: QgsEncodingFileDialog(QWidget parent=None, QString caption=QString(), QString directory=QString(), QString filter=QString(), QString encoding=QString()): argument 3 has unexpected type 'QPyNullVariant'

Traceback (most recent call last):
  File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/doVectorGrid.py", line 269, in outFile
    ( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self )
  File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/ftools_utils.py", line 285, in saveDialog
    fileDialog = QgsEncodingFileDialog( parent, "Save output shapefile", dirName, filtering, encode )
TypeError: QgsEncodingFileDialog(QWidget parent=None, QString caption=QString(), QString directory=QString(), QString filter=QString(), QString encoding=QString()): argument 3 has unexpected type 'QPyNullVariant'

Python path: ['/Users/dimitriosefthymiou/.qgis2/python/plugins/processing', '/Applications/QGIS.app/Contents/MacOS/../Resources/python', u'/Users/dimitriosefthymiou/.qgis2/python', u'/Users/dimitriosefthymiou/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/singledispatch-3.4.0.3-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/PIL', u'/Users/dimitriosefthymiou/.qgis2//python', '/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']

Pleas help.

Traceback (most recent call last): File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/doVectorGrid.py", line 269, in outFile ( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self ) File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/ftools_utils.py", line 285, in saveDialog fileDialog = QgsEncodingFileDialog( parent, "Save output shapefile", dirName, filtering, encode ) TypeError: QgsEncodingFileDialog(QWidget parent=None, QString caption=QString(), QString directory=QString(), QString filter=QString(), QString encoding=QString()): argument 3 has unexpected type 'QPyNullVariant'

Python path: ['/Users/dimitriosefthymiou/.qgis2/python/plugins/processing', '/Applications/QGIS.app/Contents/MacOS/../Resources/python', u'/Users/dimitriosefthymiou/.qgis2/python', u'/Users/dimitriosefthymiou/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/singledispatch-3.4.0.3-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/PIL', u'/Users/dimitriosefthymiou/.qgis2//python', '/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']

Pleas help.

Traceback (most recent call last):
  File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/doVectorGrid.py", line 269, in outFile
    ( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self )
  File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/ftools_utils.py", line 285, in saveDialog
    fileDialog = QgsEncodingFileDialog( parent, "Save output shapefile", dirName, filtering, encode )
TypeError: QgsEncodingFileDialog(QWidget parent=None, QString caption=QString(), QString directory=QString(), QString filter=QString(), QString encoding=QString()): argument 3 has unexpected type 'QPyNullVariant'

Python path: ['/Users/dimitriosefthymiou/.qgis2/python/plugins/processing', '/Applications/QGIS.app/Contents/MacOS/../Resources/python', u'/Users/dimitriosefthymiou/.qgis2/python', u'/Users/dimitriosefthymiou/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/singledispatch-3.4.0.3-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/PIL', u'/Users/dimitriosefthymiou/.qgis2//python', '/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']

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"Browse" button returns python error in QGIS

I use the latest version of QGIS (2.8.2) in MAC and have se the default Python version 2.7. Moreover, I have installed all the required python modules and GDAL.

It was working before, but now, when I click on the "Browse" button in Vector-> Research tools->Vector Grid, it returns the following error (actually, it returns this error whenever I click on any "browse" button in QGIS):

An error has occured while executing Python code:

Traceback (most recent call last): File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/doVectorGrid.py", line 269, in outFile ( self.shapefileName, self.encoding ) = ftools_utils.saveDialog( self ) File "/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools/ftools_utils.py", line 285, in saveDialog fileDialog = QgsEncodingFileDialog( parent, "Save output shapefile", dirName, filtering, encode ) TypeError: QgsEncodingFileDialog(QWidget parent=None, QString caption=QString(), QString directory=QString(), QString filter=QString(), QString encoding=QString()): argument 3 has unexpected type 'QPyNullVariant'

Python version: 2.7.6 (default, Sep 9 2014, 15:04:36) [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)]

QGIS version: 2.8.2-Wien Wien,

Python path: ['/Users/dimitriosefthymiou/.qgis2/python/plugins/processing', '/Applications/QGIS.app/Contents/MacOS/../Resources/python', u'/Users/dimitriosefthymiou/.qgis2/python', u'/Users/dimitriosefthymiou/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/C/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/singledispatch-3.4.0.3-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages', '/Library/Python/2.7/site-packages/PIL', u'/Users/dimitriosefthymiou/.qgis2//python', '/Applications/QGIS.app/Contents/Resources/python/plugins/fTools/tools']

Pleas help.