Group Footer doesn't work when only one group
In delphi 10.4 with fastreport VCL (i try to migrate from crystal report)
I use a dataset whith a join beetween two tables (invoice header and invoice lines) with a query that extract only one invoice but several lines
I set up group header on invoice number (wich is on every lines)
Master data print correctly the lines (qty , unit price, amount)
Group header print correctly (customer, invoice date invoice number etc ...)
Group footer doesn't print anything (invoice due date, bank anccount , paiement conditions etc ...)
Is it because there is no change of the grouping value ? How can i print it anyway ?