To reproduce:

1. Create report calchighestbug with the expression field in
page footer with expression

iif(t, tekst,'')

2. Select Calculate : Highest for this field

3. Run the following code

CREATE CURSOR t ( t l, tekst c(60) )
INSERT INTO t VALUES ( .f., '' )
INSERT INTO t VALUES ( .t., 'aaaa' )
REPORT FORM calchighestbug preview

Observed result:
print preview is empty

Expected result:
print preview must contain letters aaaa

Occurs in VFP 9 SP 1 with all set enginebehaviour settings.

Notes
Does not occur in VFP 7
Does not occur is expression is changed to iif(t, tekst,' ')
Repro code is available at www.eetasoft.ee/calchighestbug.zip

Please confirm that this is bug introduced by VFP 9
Any idea how to fix it without changing report ?