Larry, thank you for the suggestion. While setting up to run the test you suggested, I copied down a fresh file from PWA. Copy/Paste worked fine with the new file. It’s still over 40 meg, but all seems to work OK. Looks like I have a corruption problem. Now i need to determine how many local saves I can do before the file is corrupted. I really need to work locally since it takes over 85 minutes to save to PWA, and almost that long to publish (very painful).
Again, thank you for the suggestion. Hopefully, I can nail down the source of the alleged corruption and will be able to use project the way i need to.