I converted my .mov files to .avi files via a separate program. I was able to get the project to run mostly error free. I did get the message once after replacing the .mov files with .avi version, but none after that one instance. I was able process the project into a file and upload it onto Facebook with any problems.
I did not convert all the .mov files in the project, just two. And those two .mov I had originally split and slowed down, or added an effect/transition. The other .mov files were either just split or shortened (no effects or speed changes) and did not generate errors.
I suspect that something about the Power Tools or Effects corrupted the .mov source file. The .avi files received the same edits and effects/transitions without generating the error.
Thanks for the suggestions.
I do agree that the message could be a little more intuitive. And a searchable DB would be helpful. Or even just a log file that can be upload to CL.