Hi phenixbb, I'm trying to understand the current status of joint X-ray/neutron refinement in phenix.refine. The announcement of the latest release mentions a change in the algorithm as described in the recent publication. In the documentation: https://phenix-online.org/documentation/reference/refinement.html#neutron-an... Structure refinement in PHENIXhttps://phenix-online.org/documentation/reference/refinement.html#neutron-an... phenix-online.orghttps://phenix-online.org/documentation/reference/refinement.html#neutron-an... [X] https://phenix-online.org/documentation/reference/refinement.html#neutron-an... it's described how you can run joint refinement using a parameter file. Does this mean that it is *only* possible in this way and not through the GUI? The GUI was very useful in the past as it automatically opened Coot with the maps for both X-rays and neutrons, and the refinement statistics for both were displayed in the GUI. As far as I can see joint refinement via the GUI last worked in version 1.19.2-4148 from 2021. Best regards Derek