TEXTAL expects map in X-PLOR format but what kind of map? One can make a number of different maps in CCP4 (simple, mFo-nFc, etc.). Which type make TEXTAL happy?
Textal can deal with simple maps, back-transformed (Fc), and 2Fo-Fc maps. One can also make such maps with phenix.refine, textal.makemap, or various map-making tasks in the phenix GUI
Just to mention: if you run the command % phenix.refine data.mtz model.pdb by default it will perform some model refinement (3 macro-cycles) and will write out two maps mFo-DFc and 2mFo-DFc in XPLOR format. If you don't want any refinement to be performed, just type: % phenix.refine data.mtz model.pdb main.number_of_macro_cycles=1 main.refine_site=false main.refine_adp_individual=false this will do the anisotropic scaling, bulk solvent modeling, calculation of m and D, and finally writing out two maps mFo-DFc and 2mFo-DFc. For more info and options look phenix.refine documentation at http://www.phenix-online.org/download/cci_apps/ Thanks for your questions, Pavel.