Question

I have the following tiny PowerShell script that’s meant to kill some certain processes on a remote machine:

$destPS = "mywebserver1"
$brokerPIDs = Get-Process -ComputerName $destPS | ?{$_.processname -eq "uniRQBroker" -or $_.processname -eq "uniRTE"}
foreach ($process in $brokerPIDs){
    $thisId = $process.ID
    Write-Host "Killing PID $thisId"
    Invoke-Command $destPS {Stop-Process $thisId}
}

However, I’m getting the following error:

Cannot bind argument to parameter ‘Id’ because it is null.

As far as I can see, the pipeline shouldn’t be interrupted by anything, so I’m not quite sure where I’m going wrong.

Answer 1

The script block doesn’t get the $thisId and that is set to null. So stop-process gives the error. You can pass the arguments to the script block like @Rynant mentions.

Since all you are doing is to get the processes and kill processes that match your requirement, move the commands into a script block and execute that scriptblock as whole using Invoke-Command on the remote box:

$script = {Get-Process -name uniRQBroker,uniRTE  | stop-process -passthru | %{write-host killed pid $_.id}}

invoke-command -script $script -computer $destPS