I am using jsper studio 5.6, I use cherry group report, and use subreport in group to get another table field info,
I set variable_1 as return value of subreport, I can display it when I set evaluation time=band.
then I define a variables named V1= $F{field}- varables_1, I found it always return null.
if I directly input above expression in a text field and set evaluatoin time=band , it works!
What's the reason?
since I need sum(V1) in group, I have to use V1 instead of text field.
what I should do? is it a bug? or is there any propertity I can set?
