I'm sorry for the frustration. I have not run into this issue, nor could I reproduce - which probably just means something subtle is going on.  Here's what I did to try to reproduce:

- Backed up some ProSeries Ty19 files to my desktop

- Deleted them

- Right Clicked in HomeBase, chose Restore, selected all the files, and chose "Restore Clients"

Is there anything different I'm doing?

Can you post a screenshot of the error(s) or detail the exact message(s) you are getting? That might help us look in the code to see what situation the error is used for. Also, if you're comfortable doing so, can you email \32bit\Logs\proseries.txt to proseries_engineering@intuit.com?  The 32bit folder will be wherever you install ProSeries - usually either C:\\ProWin20\32bit or C:\\BasWin20\32bit