First Time I had this issue

It turns out that if you suppress a component in an assembly, then later wish to insert that component (or Sub-Assembly) into a 2-D drawing, Solidworks also suppresses that component (or sub assembly) in it's own file as well. (Should not really do that). . But yes it did. . As I opened each sub-assembly, it was blank.

I had to open up all sub assemblies, Un-Suppress, Save, then I could refresh the View Palette and drag views into my drawing as usual.