checkCIF procedure

PLAT706

 Hydrogen-Bond H..A listed in the CIF is checked. Alerts are set at 1,2 and 
 3 Sigma deviation levels.  
 This ALERT is generally related to incorrect symmetry codes. The symmetry  
 number s in the symmetry code s_pqr should correspond to the expression
 for s in the CIF. Those expressions can be different for different 
 software packages. E.g. pasting H-bond table data generated with PLATON
 into a CIF generated with SHELXL may raise this ALERT. Manual correction   
 of the symmetry code should be trivial.