DeltaCopy rSync ue4 problem

F:\DeltaCopy\

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Connecting to a1011 as user retrozelda to create an SSH Key.

Please note the following:
  It may prompt you about "authenticity of host can't be established." You must
enter yes
  It will then prompt your for your password on a1011
  Finally it will ask your for a 'passphrase' for your new SSH key. Do NOT give
it a passcode, just hit enter
  Hit enter again when prompted to confirm.
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Press any key to continue . . .
Password:
Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Generating public/private rsa key pair.
Your identification has been saved in RemoteToolChain.
Your public key has been saved in RemoteToolChain.pub.
The key fingerprint is:
25:bf:00:51:c1:15:fe:7a:00:c3:13:1a:ea:0d:8e:a0 retrozelda@a1011
The key's randomart image is:
+--[ RSA 2048]----+
|      oo+oo.     |
|     . =.o       |
|.   o o * o      |
|.. + o . B .     |
|E . o . S o .    |
|         . +     |
|          o .    |
|           .     |
|                 |
+-----------------+

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Now we will connect again to a1011 to download the generated private key.
You will have to enter your password again.
The private key will be stored in:
   "C:\Users\RetroZelda\AppData\Roaming"\Unreal Engine\UnrealBuildTool\SSHKeys\a
1011\retrozelda\RemoteToolChainPrivate.key

If you want to share this key with others on your team, copy the contents of SSH
Keys directory to:
   ../../../Engine/\Build\SSHKeys
and then put it into your source control.
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Press any key to continue . . .
Password:
      0 [main] ssh 15292 fhandler_base::dup: dup(some disk file) failed, handle
194, Win32 error 50
dup() in/out/err failed
rsync: connection unexpectedly closed (0 bytes received so far) [receiver]
rsync error: unexplained error (code 255) at /home/lapo/packaging/rsync-3.0.4-1/
src/rsync-3.0.4/io.c(632) [receiver=3.0.4]

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Assuming you have seen no errors above, you are ready to compile UE4 remotely on
 a1011!
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Press any key to continue . . .