Hi, I know this topic was discussed before, but I am still confused and still unable to refine my map merged from hires data because phenix.refine complains "No array of R-free flags found" The command was used to generate a hires map. phenix.autobuild data=resolve_1.mtz hires_file=hires.sca \seq_file=sequence.dat maps_only=True So, now I have "exptl_fobs_phases_freeR_flags.mtz", "cycle_best_1.mtz", "overall_best_denmod_map_coeffs.mtz"...several files in my autobuild folder, How do I merge low and high resolution data by "phenix.reflection_file_editor"? What files (input and output arrays) should I choose? Detail description will be very appreciate. Thanks for answer my question. PC _________________________________________________________________ Windows Live: Make it easier for your friends to see what you’re up to on Facebook. http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/soc...