why don't u create a formula named noerror where
noerror contains
{
if error=false then
1
else
0
}
summarize sum of noserror formula in group. And create another group summary field that counts the records.
now goto section expert and click on group header
check on suppress and click on formula
in suppression formula type as follows
{
if group summary field(noerror)=count(no of records in group) then
true
else
false
}
repeat the same formula in suppression formula for group footer and detail section as well.
Hope this works as it worked in mine.
remember that the code in here is just the logic. convert it into your logic as per your database fields and names given to the fields.
Try and see if it works