Processing Table problem in FilePro 4.0

[rlmuller at uscomputergurus.com]

Hi All,

I'm running FP4.0 over WinXP-Pro/SP2.  I've got the following input
processing table for a two-field MyCust file:

1  -------------------------------------
@WEF1   If @CD EQ ""
                Then 1 = "1000"+ at RN
2  -------------------------------------
                If
                Then END
3  -------------------------------------
@WLF1   If 1 GT ("1000"+ at RN)
                Then BEEP; SHOW "CustID must be in the range 1001-" &
("1000"+ at RN);
SCREEN, 1
4  -------------------------------------
                If
                Then END
5  -------------------------------------

Problem: Field 1 does not get populated immediately when an update
screen is displayed ... it is blank then.  But if I leave it blank and
save,  scanning the file shows it to be properly set.  Why isn't it
populated before the display?  (I tried 'if 1 EQ ""' too, but to no
avail.)