hi to all i have several "Detail" bar. And there is a table in each "Detail" band which gets data from own "Data Source". When report runs (all have own datasource ) returns total row count to the master dataset. l want that "total row count" value to use in title band i fixed a "Text Field" to that Title Band. and i have set "Print When Expression" of that "Text Field" $V{v_row_count_main} !=null Yes my plan is total row count will be shown when table which is in "Detail" band returns rows. i mean more than zero row. such as 1, 2, 3 or more row. but when table returns zero row or null value that "Text Field" will be disappear.. but this is not working because "Print When Expression" always using $V{v_row_count_main} value in calculating as null. thanks to all