msdeploy reports invalid path - why?

Here is the script we "run as" administrator:

net use I: \\csmwebp\e$\inetpub\cityroot 1>>c:\temp\testing\test2.txt 2>>&1

net use J: \\csmwebd\cityroot 1>>c:\temp\testing\test2.txt 2>>&1

net use J: 1>>c:\temp\testing\test2.txt 2>>&1

msdeploy.exe -verb:sync -source:dirPath=J: -dest:dirPath=I:,getCredentials=csmwebp -skip:objectName=dirPath,absolutePath=_vti_pvt -skip:objectName=dirPath,absolutePath=_vti_cnf  -skip:objectName=dirPath,absolutePath=\\cityroot\\cityclerk\\council -skip:objectName=dirPath,absolutePath=-donotpublish 1>>c:\temp\testing\test2.txt 2>>&1

net use I: /delete 1>>c:\temp\testing\test2.txt 2>>&1

net use J: /delete 1>>c:\temp\testing\test2.txt 2>>&1

Here are the contents of C:\temp\testing\test2.txt (my comments in italics):

The command completed successfully. -- net use I: \\csmwebp\e$\inetpub\cityroot was successful

The command completed successfully. -- net use J: \\csmwebd\cityroot was successful

Local name        J:

Remote name       \\csmwebdev01\cityroot

Resource type     Disk

Status            OK

 # Opens           0

 # Connections     1

The command completed successfully.

Error: Object of type 'dirPath' and path 'J:' cannot be created. Error: File system path 'J:' is not valid. Only absolute paths are supported. Error count: 1.

 I: was deleted successfully.

J: was deleted successfully.

Please advise, why is J: considered invalid?

Thank you,

Roslyn Wythe