Robocopy Invalid Parameter /BYTES

Question

I would like to use robocopy with the /BYTES parameter. When I use it I receive an invalid parameter error:

ERROR : Invalid Parameter #6 : "/BYTES"

I am using Windows 7. When I do a robocopy /? I get this:

-------------------------------------------------------------------------------
   ROBOCOPY     ::     Robust File Copy for Windows     ::     Version XP010
-------------------------------------------------------------------------------

Version XP010 does not have the /BYTES parameter, but Windows 7 was supposed to ship with version XP027, which does. When I check the version of robocopy.exe it says 5.1.10.1057, which I believe is XP027.

What gives? Can anyone help me out with this?

References:

Edit: I found a hotfix for robocopy and updated to version 6.1.7601.22012, but the error still occurs.

It would help if you posted the full command you are running. — Gene, Sep 01 '15 at 03:11
I suppose it would have. It was just a simple copy, nothing fancy. I knew the command itself was fine - it was solely the `/BYTES` parameter causing strife. — hsimah, Sep 01 '15 at 03:29

score 3 · Accepted Answer · edited Sep 01 '15 at 06:49

3

You likely have an old version in a directory listed in your path before C:\Windows\System32\ which is where robocopy is normally located. To find out where your copy is running from run where robocopy. On a regular system the result would be:

C:\>where robocopy
C:\Windows\System32\Robocopy.exe
C:\Program Files (x86)\Windows Resource Kits\Tools\robocopy.exe

C:\>

edited Sep 01 '15 at 06:49

hsimah

135
6

answered Sep 01 '15 at 03:17

Brian

3,476
18
16

Thanks mate, this was exactly the problem. I feel kinda silly for not realising it myself. I didn't install the Windows Resource Kit on this machine, it must be part of my work's SOE. – hsimah Sep 01 '15 at 03:22

Robocopy Invalid Parameter /BYTES

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