Trying to add a field to shapefile feature class. Field type is text. When I save the changes the feature class data just disappears and there is a ! in front of the class name. If I delete the feature class and then try to bring the shapefile in again I get the message "Number of shapes does not match the number of table records." The shapefile dbf file is the only thing that was changed when I tried to do the original field add. Any ideas?