I get -1. I'm guessing because lastNumber is 0.

I haven't used bookmarks before, so maybe I'm doing that part wrong? I'm bookmarking by left clicking on the paragraph number. Because it's a numbered list, all of the list numbers are highlighted light grey, and the paragraph number I clicked on is dark grey. I then Click Insert Bookmark from the ribbon and a Bookmark dialog comes up, and I name it.

Any guess as to what I'm doing wrong?

Thanks.