ALV Grid Subtotals Collapse / Expand

Hi all,

I developed my first ABAP/4 program that creates an ALV.

I followed some of the standard examples presented in this forum and everything worked fine but one point: when a column is subtotalized, I can dynamically set the GRID to show only subtotals and each subtotal line offers a small icon, which, I believed, would expand the items which generated that subtotal...

But as to my surprise, when I click on that smal icon, those items are not displayed, i.e., GRID doesn't expand them...

I know that I must have forgotten to set/reset some parameters (there are so many!) and I believe that only those who have had the same problem will be able to tell me to check this or that...

Anyhow, is there any blessed soul out there able to help me up?

Your points will be more than happily rewarded!

Many thanks in advance,

Alberto