Hi Celine, The interfaces have changed a lot since we published the example in the newsletter. An updated version is available here: http://cci.lbl.gov/~rwgk/tmp/example_bulk_solvent_mask_2007_04_03_1806.py This is only the mask calculation. The rest of the functionality is incorporated in the f_model.manager (I think it is explained a bit in newsletter No. 5). Let me know if you are still having trouble getting the example to work with the latest cctbx version. Ralf ____________________________________________________________________________________ Don't get soaked. Take a quick peek at the forecast with the Yahoo! Search weather shortcut. http://tools.search.yahoo.com/shortcuts/#loc_weather