robocopy transfer file and not folder

I'm trying to use robocopy to tranfer a single file from one location to another but robocopy seems to think I'm always specifying a folder. Here is an example:

robocopy "c:\transfer_this.txt" "z:\transferred.txt"

But I get this error instead:

2009/08/11 15:21:57 ERROR 123 (0x0000007B) Accessing Source Directory c:\transfer_this.txt\

(note the '\' at the end of transfer_this.txt)

But if I treat it like an entire folder:

robocopy "c:\folder" "z:\folder"

It works but then I have to transfer everything in the folder.

How can I only transfer a single file with robocopy?

From serverfault $pageUsers[$entry.posts[0].author].name

• See Robocopy /?

  Usage : ROBOCOPY source destination [file [file]...] [options]

  robocopy c:\folder d:\folder transfer_this.txt

  From KPWINC

• Acording to the Wikipedia article on RoboCopy:

  http://en.wikipedia.org/wiki/Robocopy#Folder_copier.2C_not_file_copier

  Folder copier, not file copier

  Robocopy syntax is markedly different from standard copy commands, as it accepts only folder names as its source and destination arguments. File names and wild-card characters (such as ".*") are not valid source or destination arguments. Files may be selected or excluded using the optional filespec filtering argument. Filespecs can only refer to the filenames relative to the folders already selected for copying. Fully-qualified path names are not supported. For example, in order to copy the file foo.txt from directory c:\bar to c:\baz, one could use the following syntax*

  robocopy c:\bar c:\baz foo.txt
  

  From Adrian De Leon