Thanks for pointing that out, demiGod & helping.

Yep, I do have some path directories-- though after removing them and putting their contents into the project folder (as well as all the plugins and other asset files), doesn't fix it. Bummer!

I can't find a thread on this error message anywhere on this forum archive going back three years. Is this so rare an error? Or maybe I didn't search for the right keywords. I wonder if I just have too large of a project.. though if its not too large for development mode.. that wouldnt make much sense.