Hi,
I work with version DR 6.1.4.9606
I have a group, if the sum of the field brutto is eq 0, the group should be hidden.
Code:
return (Sum(drsum,drgroup1,{NichtzugeordneteRechnungen.BRUTTO}))
It works for 99 procent of cases.

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Look at RNR 1569 in the groupheader and also in the group footer is the value eq 0.
What can be the cause?