Hi,

looking through
http://sourceforge.net/p/cctbx/code/HEAD/tree/trunk/mmtbx/refinement/minimization.py
shows at line 61
from phenix.refinement import weight_xray_chem
and http://sourceforge.net/p/cctbx/code/HEAD/tree/trunk/mmtbx/refinement/occupancies.py
line 134

Is weight_xray_chem.py code that could move to cctbx? (cctbx_project/mmtbx/refinement/weight_xray_chem.py)

Are there other cross dependencies?