Hi all, I tried to install yt using the All-in-One Installation Script. I'm using Ubuntu 14.04, and I have installed the required packeges listed at the beginning of the script. All the installation process went fine, then I sourced the activation script in a new shell, and to check if everything was fine, I typed yt --help, and this is the output: Traceback (most recent call last): File "/home/andrea/Software/yt/yt-x86_64/bin/yt", line 9, in <module> load_entry_point('yt==3.2.3', 'console_scripts', 'yt')() File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 558, in load_entry_point File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2682, in load_entry_point File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2355, in load File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2361, in resolve File "/home/andrea/Software/yt/yt-x86_64/src/yt-hg/yt/__init__.py", line 146, in <module> from yt.visualization.api import \ File "/home/andrea/Software/yt/yt-x86_64/src/yt-hg/yt/visualization/api.py", line 22, in <module> from .particle_plots import \ File "/home/andrea/Software/yt/yt-x86_64/src/yt-hg/yt/visualization/particle_plots.py", line 24, in <module> from .plot_window import \ File "/home/andrea/Software/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.py", line 34, in <module> from .plot_modifications import callback_registry File "/home/andrea/Software/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_modifications.py", line 26, in <module> from mpl_toolkits.axes_grid1.anchored_artists import AnchoredSizeBar File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/mpl_toolkits/axes_grid1/__init__.py", line 9, in <module> from .axes_grid import Grid, ImageGrid, AxesGrid File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/mpl_toolkits/axes_grid1/axes_grid.py", line 8, in <module> import matplotlib.pyplot as plt File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/pyplot.py", line 109, in <module> _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup() File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/backends/__init__.py", line 32, in pylab_setup globals(),locals(),[backend_name],0) File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/backends/backend_qt4agg.py", line 17, in <module> from .backend_qt5agg import NavigationToolbar2QTAgg File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/backends/backend_qt5agg.py", line 18, in <module> from .backend_qt5 import QtCore File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/backends/backend_qt5.py", line 31, in <module> from .qt_compat import QtCore, QtGui, QtWidgets, _getSaveFileName, __version__ File "/home/andrea/Software/yt/yt-x86_64/lib/python2.7/site-packages/matplotlib-1.4.3-py2.7-linux-x86_64.egg/matplotlib/backends/qt_compat.py", line 126, in <module> from PySide import QtCore, QtGui, __version__, __version_info__ ImportError: No module named PySide I tried different configurations, such as installing the stable and the yt branch, turn on/off the scipy installation flag in install_script.sh, but nothing. Please, do you have any suggestions? Thanks in advance, Andrea