Now a legitimate question: both files are empty (they were created by another app I've made that just creates an Excel document), so they are 0 Kb each.

Windows refuses to copy them as if they don't exist. Is there a workaround for this?

P:\test>md test

P:\test>copy con test\fred
^Z
        1 file(s) copied.

P:\test>dir test
Directory of P:\test\test
14/01/2004  22:32                 0 fred
               1 File(s)              0 bytes

P:\test>md test2

P:\test>copy test\fred test2
        1 file(s) copied.

P:\test>dir test2
Directory of P:\test\test2
14/01/2004  22:32                 0 fred
               1 File(s)              0 bytes
[download]

?