Hi, Could you please tell me why am I getting this error " No atom selected: "name O and chain W and resname HOH and resseq 69". Log file ends as follows: ============================= Scattering factors ============================= ----------X-ray scattering dictionary---------- Number of scattering types: 7 Type Number sf(0) Gaussians Zn2+ 1 27.88 1 S 10 15.96 2 P 2 14.95 2 Mg2+ 3 9.96 1 O 635 7.97 2 N 523 6.97 2 C 1983 5.97 2 sf(0) = scattering factor at diffraction angle 0. ========================== Anomalous scatterer groups ========================= All atoms refined with f_prime=0 and f_double_prime=0. ======================== Summary of geometry restraints ======================= Number of disulfides: simple=0, symmetry=0 Custom bonds:Sorry------------------------------ Thanks a lotSDY