Jasper Reports Multiple Groups Headers,Keep It Together - Related Issues

In your  Jasper report , If you have multiple groups  with  their  headers and you want to use  Keep Together Option allso .But in most cases it will not work properly . 

So try this way , Add  all  the group headers to the innermost group and  apply   Keep Together Option to  that  group . Give minimum height to start new page  as 100  also .Hope you this way will work.