ERRMSG Keyword in display files....

Hi,
        I've got some date fields on display record defined as numeric length 
8,0. 
The user enters a 6-Digit(Without Century) date in these fields. Now I've
got to validate these dates and redisplay them as 8-Digits(With Century).
If there is any error in one of these dates I'm setting on the appropriate
ERRMSG indicator.
While Validation I'm first validating all the fields on screen and setting
on the appropriate ERRMSG indicator associated with that field if there is
no error I'm moving the 8-digit date into the same field. Now when give
EXFMT Recfmt for redisplaying when there are no errors in any of the fields
they are displaying the new values(8-Digit dates). If there is any error in
any of the field then the values even in the other date fields aren't get
updated on the screen(It displays only the 6-Digits for all). 
        If I've got to update the values in the date fields in display which
aren't having errors what am I supposed to do.
        This may be silly but anyway please help me out...
TIA
Regards,
Prakash.
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