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". 
        
          ============================= 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