Duplicacy on Windows 10 is not able to back up certain files that have special characters in the filename.
The file names have emoji characters in the filenames—in Windows the file name tends to look like brackets or wingdings/emoji.
The files can be opened by Windows just fine, but Duplicacy won’t. The error is that it “Failed to open file for reading: open N:/.duplicacy\shadow/…�.jpg: The system cannot find the file specified.”
Does the error happen if the VSS operation is not enabled? Can you find out the unicode of the character in question by pasting it to https://unicodelookup.com?
Thank you—it does happen with VSS disabled.
It’s emoji being turned into file names that then have emoji like characters in the file names. For example, the source is 
and then in the file name it has a character like that, though it applies to quite a few emoji like symbols.
The Unicode lookup does not seem to be very helpful: https://unicodelookup.com/?#💪/1
I couldn’t reproduce the problem. A file with this emoji in the name was backed up correctly:
15:50:18.876 Packing 💪💪💪💪💪💪.txt.txt
15:50:18.877 Packed 💪💪💪💪💪💪.txt.txt (32)
Another example:
15:53:42.793 Packing 👨⚕️.txt
15:53:42.795 Packed 👨⚕️.txt (32)