I ASPACKED MyProg.exe and it created a backup of MyProg.exe called MyProg.exe.bak!
Then, mistakenly, I ASPACKED it again and the end result was a double ASPACKED program that had a duff icon but still worked!
At least until I copied it to a new folder!
Then, when I tried to run it, it gave a SIDE-BY-SIDE CONFIGURATION error!
The interesting thing is that, if I copied a version that had only been ASPACKED once, to that same folder, then the once-ASPACKED FILE worked PERFECTLY!
Then, when I ran the double-ASPACKED file again, (AS LONG AS I HAD the SAME NAME as the working Version) in the Folder where it had previously given the SxS error, lo and behold it worked!
If I changed the name, it once again gave the SxS error!