Hi.
You mixed the capital /S and the small /v in your command. Also there must be one string after /v "xxxxx xxxxx "
I am using this for a citrix silent install:
Setup.exe /S /v"SETMULTIUSER=1 MULTIUSERBASEDIR=H: MULTIUSERCOMMONDIR=C:\ProgramData CITRIX=1 /qb"
Regards
Daniel