Ran into a serious problem and I can't find any iClone 8 documentation that would explain it; never saw this in iClone 7.
I've built up a street scene using primitives and suddenly only the highest-level props, not their subprop attachments, display in Scene Manager.
I understand there are Merge commands available with right-click, but they don't seem to be documented.
Besides, I didn't perform any merges anyway!
How do I get Scene Manager to display all my objects again?

Animating now to life itself --Walt Whitman 

Fortunately, the list was repopulated after I closed the project and opened it again.
This is a bug that should be fixed,

Animating now to life itself --Walt Whitman