Hello all, I am pretty new to graph-tool and trying it because of the fast speed. However, it seems that graph-tool cannot work together with mlab in mayavi. I am basically planning to plot a 3D graph using mlab. But when I import mlab from mayavi, the program always prints the following warning and then becomes frozen. I don't know why. Is it the problem of gtk? I just want to use graph-tool data structure and algorithms output : /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: cannot register existing type `GtkWidget' g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: cannot add class private field to invalid type '<invalid>' g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: g_type_add_interface_static: assertion `G_TYPE_IS_INSTANTIATABLE (instance_type)' failed g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: cannot register existing type `GtkBuildable' g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: g_type_interface_add_prerequisite: assertion `G_TYPE_IS_INTERFACE (interface_type)' failed g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:142: Warning: g_once_init_leave: assertion `result != 0' failed g_type = info.get_g_type() /usr/lib/python2.7/dist-packages/gi/module.py:146: Warning: g_type_get_qdata: assertion `node != NULL' failed type_ = g_type.pytype -- Cheers, Bo Wu