When I try to calculate a field nothing happens. I have always been able to just select the field, open the field calculator and type = and the new number. This is frustrating because the other GIS person can do it with no problem. I've tried several different tables, numeric and string fields. I don't know Python and shouldn't need to use it just to change a field of numbers to a different number. I have uninstalled ArcGis 10 and reinstalled it and SP1.