When replacing one table with another table, it is possible that one or more of the fields on the report won’t have exact matches in the new table. If the fields in a table are renamed or deleted, this affects the existing fields on your report. When this happens, Crystal Reports gives you the option to remap the existing fields to the new fields in the database.
After using the Set Location dialog box or when using the Verify Database function, Crystal Reports checks if any changes have been made to the table. If it detects that a change has occurred that affects fields being used on the report, it opens the Map Fields dialog box shown in Figure 10-17. It shows the fields that don’t have a matching field in the current table. It also shows you the new fields in the data source so that you can match the old fields to the new fields. Crystal replaces them accordingly.