*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html *** Dear all: When adding water to my structure , I found that a water molecule was just on a two-fold axis.If I put a water there , CNS will complain water## and symm water## are too close. What shall i do ? Many thanks in advance! Ye Xiang