When replicating a network drive, sometimes it doesn't connect, and nothing is replicated. I can click on the network drive in windows explorer to make sure it is connected, and then rerun the replicator. It always works the second time. I don't know if anything can be done ( such as waiting longer for the connection to a remote drive ).
I'm guessing that the Win32 CopyFileEx is returning some sort of timeout or reconnecting notice. I'll have to check into what the deal is, but Replicator should definitely be able to wait for this event.