calibre automatically ensures that the destination path is not too long, and as far as I know that part of the code was not touched in 2.10. It should be an easy test, simply copy one of those source folders to a location like c:\books (so that the total path length is less than 255 characters) and try adding.
calibre automatically ensures that the destination path is not too long, and as far as I know that part of the code was not touched in 2.10. It should be an easy test, simply copy one of those source folders to a location like c:\books (so that the total path length is less than 255 characters) and try adding.