I have a Section that only contains a SubReport.
I have a formula on \"suppress (no drill down)\" that hides the subreport. This works. However it leaves a big blank
Right click on the subreport. Format Subreport -> Subreport -> Suppress Blank Subreport.
This option is available at least on version 11.5.x
Use same or similar formula (which you use for subreport hiding) for main report section supressing too. "Supress blank section" doesn't work well with subreports.
You will have suppress blank section in the sub report as well. Try checking this suppress blank section in all the sections of the subreport. It should work for you
OK, I sorted it out.
The problem was the next subreport / section I wanted to show was too long to fit on the first page so was starting on a new page each time.
To fix I had to right click the subreport click "format subreport" then click the subreport tab, then untick "Keep Object Togeather"