A bad combination. Why to use it? Because you need that XML. What can happens? Ugly thinks. Like what was happening to me: after executing this command in my XML there was a new character (that SUB), visible only in special editors:

The result is an invalid XML file. Untill now it was ok, this batch was working coreclty so it is posible that my computer has received some viruses or something goes wrong with my Windows. I didn't find the answer!
The solution is ... to not use copy; there is xcopy ms-dos command or robocopy [I didn't used it yet].
f33766e4-61f5-4fc1-8dd1-1307a879fff1|1|4.0