Dear Phenix Developers, A lab member told me that in the latest nightly build (dev-572, for OS X-intel), the GUI appears to override Group ADP mode. Specifically, if one selects "Group ADP refinement mode" as "Group Selection" in the GUI, and reopens the same window later on, the mode seems to have reverted to something else (like two groups per residue). The workaround is to "Edit parameters and run". I have reproduced this problem with my own files. Can you guys reproduce this, or are we missing something here? Best, Engin -- Engin Özkan Post-doctoral Scholar Howard Hughes Medical Institute Dept of Molecular and Cellular Physiology 279 Campus Drive, Beckman Center B173 Stanford School of Medicine Stanford, CA 94305 ph: (650)-498-7111