I have a screen with 3 fileds, say field 1, field2, field3. I have a AID key, say ENTER, which saves the data that i have entered on the screen. Now i enter values in field2 and filed3 and press ENTER. At this time i should get a message saying the filed1 is empty and the data should not be saved. But if the user ignores this warning and presses ENTER again with the same 2 fileds entered, then the data should be saved ino the file with the 1st field values as spaces. Is there any attribute that can be set for the field while defining the map to ensure such functioning??