Many cmlets from SMLets module has the –ServerName or –SCSMSession parameters. The first of them never worked (rise the error), with second you must use session’s variable each time then execute the command and not all of the cmdlets support this pararmeter. But the SMLets has the solution to run all cmdlets again server which are differ from localhost.
To do that you must set the $smdefaultcomputer variable before import SMLets module. So your script must be something like that:
$smdefaultcomputer = "SCSMSERVER" import-module SMLets # Put here any SCSM's cmdlet