>>As a matter of fact, it is some white space at the end of a group footer. However, this white space is important in making a break between groups. I have even tried to put a shape in this space with a Print When and Remove Blank Lines. This shape does not print on the last page, but the blank page is still there.
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>I don't know exactly what to do in this case. In similar, but not identical, cases, I did something like add another shape that fills out the entire height of the group footer, and never prints (print when: .F.). However, this will probably eliminate the extra space everywhere, not simply at the end of the report where you don't need it. But perhaps you can come up with some combination, making use of shapes that fill out the remaining space.

You may try to use a line across the whole footer. I'm not sure it'll work.