1. YOu have to send the value from the sub-report back to the main report as a shared variable, it cannot just be a dispaly value in the sub-report

2. you cannot suoppress the subreport or it will not run. You can suppress all of the fields in a subreport and then suppress the section that it runs in when it is blank

3. suppression from a shared variable formula can only suppress data below where that value is garnered. meaning if you pull in the value from the subreport into GH1b, GH1a cannot be suppressed. Basically you have to consider making the shared vcariablinto GHa and then move all your other values below that so you can use the resulting variable as a condition.

4. you can only suppress rows so they are still all included in any sumamry withing the main report unless you explicitly exclude them via a running total or variable formula that does the calculations.

set every field in the subreport to be suppressed.

create a new GHa

place the subreport in that GHa and only the sub report

go into the section expert (in the main report)

set this new GHa to 'Suppress blank section'=True (checked)

 

This allows the subreport to run and return a value while still 'suppressing' it in the main report

now you can pass the value from the subreport to a variable in GHb and use that result for any suppression.

 

Does that help?