When you press [Ok] to save a record of any type, the program checks each field to make certain it has a valid entry. The cursor will be placed on the first field that is invalid in any way.

Since Version 7.0. If the field is the ID for the record, the field can no longer contain certain invalid characters such as spaces and quote marks. If the ID field contains these invalid characters you must change the ID field before you will be able to save any changes. To do this, go to UTILITIES|Edit IDs.