Dear all, I'm having some troubles recently in importing pyqt4 in libtbx.python under Debian8. It used to work with a previous build compiled from the sources, but I don't find a reasonable way to make it work from the bootstrap installation. More details: 1) If I do in libtbx.python sys.path.append('/usr/lib/python2.7/dist-packages/') and "from PyQt4 import QtCore", I get an unidentified symbol: PyUnicodeUCS4_AsLatin1String 2) If I try to compile cctbx as I did in the past "python ../libtbx/configure.py cctbx" no make file is produced. Maybe I'm missing something Thanks everybody for your help. Gian -- Gianluca Santoni, PhD ESRF structural biology group 71 avenue des Martyrs 38027 Grenoble cedex (France)