Dont print pages when crosstab report with own dataset have no data

I have report with main report query that return one row always

SELECT to_date($P{param0},'yyyy-mm-dd HH24:MI:SS') AS dtstart,
to_date($P{param1},'yyyy-mm-dd HH24:MI:SS') AS dtend
FROM dual

In detail bands I have crosstab reports, that have own datasets, when crosstab dataset dont return data, iReport print blank page but in report property "When no data"="NoPages", how to avoid it and dont print blank page. I know one method for this use crosstabs query in main query how in this example:

SELECT to_date($P{param0},'yyyy-mm-dd HH24:MI:SS') AS dtstart,
to_date($P{param1},'yyyy-mm-dd HH24:MI:SS') AS dtend
FROM dual
WHERE EXISTS (SELECT * FROM crosstabdataset)

but whether there are other ways?