Dear CCTBX developers, I found phenix.maps did not recognize twinning. Clearly, "fmodel" in the following code should be "fmodel_". (underscore missing) https://github.com/cctbx/cctbx_project/blob/41df8498857c186a3f83351090683b35... However, this did not solve the problem. This is due to fmodel_.deep_copy() in line 1530. For example, fmodel_.info().show_rfactors_targets_scales_overall() fmodel_.deep_copy().info().show_rfactors_targets_scales_overall() These two lines show different stats in case of twinning (fmodel_ is mmtbx.twinning.twin_f_model.twin_model_manager object). So deep_copy() is not working correctly. I found that something was wrong with fmodel_ts1.deep_copy() here. https://github.com/cctbx/cctbx_project/blob/master/mmtbx/twinning/twin_f_mod... Does anybody know how to solve this copying issue? Best regards, Keitaro