Dear yt users, I usually install yt on system python, following the procedure suggested me in this mailing list some months ago. In general everything goes fine with the installation and I can normally use yt. Now I installed Ubuntu from scratch in my computer (where previously yt was installed and running!) and the installation seems to fine, but when I insert the command "from yt.mods import * ", I get the following error: *--------------------------------------------------------------------------- * *ImportError Traceback (most recent call last) * * * */usr/local/lib/python2.7/dist-packages/yt/<ipython console> in <module>()* * * */usr/local/lib/python2.7/dist-packages/yt/yt/mods.py in <module>()* * 56 np.seterr(all = 'ignore')* * 57 * *---> 58 from yt.data_objects.api import \* * 59 BinnedProfile1D, BinnedProfile2D, BinnedProfile3D, \* * 60 data_object_registry, \* * * */usr/local/lib/python2.7/dist-packages/yt/yt/data_objects/api.py in <module>()* * 29 """* * 30 * *---> 31 from grid_patch import \* * 32 AMRGridPatch* * 33 * * * */usr/local/lib/python2.7/dist-packages/yt/yt/data_objects/grid_patch.py in <module>()* * 33 from yt.utilities.definitions import x_dict, y_dict* * 34 * *---> 35 from yt.data_objects.data_containers import YTFieldData* * 36 from yt.utilities.definitions import x_dict, y_dict* * 37 from .field_info_container import \* * * */usr/local/lib/python2.7/dist-packages/yt/yt/data_objects/data_containers.py in <module>()* * 41 from yt.config import ytcfg* * 42 * *---> 43 from yt.data_objects.derived_quantities import GridChildMaskWrapper * * 44 from yt.data_objects.particle_io import particle_handler_registry* * 45 from yt.utilities.lib import find_grids_in_inclined_box, \* * * */usr/local/lib/python2.7/dist-packages/yt/yt/data_objects/derived_quantities.py in <module>()* * 33 from yt.data_objects.field_info_container import \* * 34 FieldDetector* *---> 35 from yt.utilities.data_point_utilities import FindBindingEnergy* * 36 from yt.utilities.parallel_tools.parallel_analysis_interface import \* * 37 ParallelAnalysisInterface* * * *ImportError: No module named data_point_utilities* * * I would like to ask if someone has an idea of how can I solve this problem. Thanks, Roberto