robocopy fails- error 53 - network path not found

I am running robocopy batch file from server 2003 to copy a folder from server1 (server 2008 r2) onto a nas drive.

robocopy /e /xo /ts /tee /r:0   /log:c:\backuplogs\robologs\folder-1.doc  "\\server1\folder-1"  "\\backupserver\backup share\backupfolder"      

However i get the error 53- getting file system type of source - the network path was not found. What someone explain what is wrong in my command. Thanks
bb itAsked:
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Usage :: ROBOCOPY source destination [file [file]...] [options]

Try (and make sure the log folder exists):
robocopy "\\server1\folder-1"  "\\backupserver\backup share\backupfolder"   /e /xo /ts /tee /r:0  /log:c:\backuplogs\robologs\folder-1.doc
bb itAuthor Commented:
Hi the logs folder do exist. What i have found is when i use the same parameters on different source and destination folders, on servers running server 2003, the copying works but it doesnt work on server 2008.
Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
When you compared, you ran RoboCopy on the same machine (not the servers)?
While the 53 error occured, do you have access to both source and destination at exactly that moment?
bb itAuthor Commented:
Yes i do have. I am running under admin account
Any of these servers dual-homed?  

You said you're running it 'from' a 2k3 server to copy 'from' a 2k8 server to the NAS.
Can you try running from the 2k8 server to the NAS?  Eliminates the unneeded overhead...
Otherwise, you might try a fully qualified name, or even IP address in your command.

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Windows Server 2008

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