Subinacl, take ownership when current owner is unknown

[esgaroth]

I have a script using subinacl and robocopy to take ownership of files and copy them to another location. This usually works fine except when the current owner of the file is not known.

Should subinacl have any problems setting ownership in this case? Here is the script I am using:

subinacl /errorlog=error.log /subdirectories "%SOURCE%/*.*" setowner="Administrators" grant=Administrators=F

robocopy "%SOURCE%" "%DEST%" /copyall /zb /w:0 /r:10 /a-:sh /s /xd "temporary internet files" /xf *.dll *.sys *.ocx