I have a sub report in which the report looks as follows:

Group header 1
Group header 2
Group header 3
   Group header 4
                 Detail a
                 Detail b
                 Detail c
                 Detail d
                 Detail e
   Group Footer 4
Group Footer 3
Group Footer 2
Group Footer 1


Now I have a query which has five parts and I separate each part using union. So I have 5 sections in the result set. The first section goes to detail a, the second to detail b, the third section to detail c, the fourth section to detail d and the fifth section to detail e. The query may or may not return data for each section. For example the result set can contain only section 1 and section 2 or section 3 and section 4.
The problem I am facing right now is that if the section is not returned I have to display a blank section of that detail. Could you please help me out with this problem. Any suggestion would be greatly appreciated.

But there are 4 group headers and one of my grouping is done as you suggested. If it were a single group it would have been ok but since there are 4 group headers it doesn't work.

not sure what is your set up
another option is a suppression formula
in section expert
go to section expert next to Suppress click x-2 button
and for each of the details section
write a suppression formula like
@formula = ""
or
someFIeld = ""