To avoid blank page

In Jasper Reports,I am having one parameter,thats
Receipttype …Receipt tyape mean Manifest,Nonmanifest,Both.f i gave
manifest Mean Maniefst datas will be printed and,if i gave Nonmanifest
mean nonmanifest datas will be printed and if i gave Both mean
Manifest and Nonmanifest datas will be printed.I called both reports
in main reports,In this palce i gave Receipt typa as both mean,here
manifest datas will be printed in 2 pages and Nonmanifest will be
printed as next page,so here i gave split allowed option as false but
in this place manifest datas is not coming mean it will printed as
Blank page.I want to avoid this blank page.please reply to my question.