Powershell - Cannot bind argument to parameter 'Name' because it is null

Question

I'm trying to stop a remote service using this Powershell script:

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $serviceName -Force
}

But getting this error message:

Cannot bind argument to parameter 'Name' because it is null.
    + CategoryInfo          : InvalidData: (:) [Stop-Service], ParameterBindin
   gValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,M icrosoft.PowerShell.Commands.StopServiceCommand

If I remove Invoke-Command from the script, I can see the variables are initialized correctly:

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"

Returns:

Hostname: myhost
Service name: myservice

What can be a reason for this?

Thanks, Roman

Possible duplicate of How do I pass variables with the Invoke-Command cmdlet? — user4003407
– user4003407, Commented Oct 26, 2016 at 22:24
stackoverflow.com/questions/36339616 and stackoverflow.com/questions/13036327 and stackoverflow.com/questions/37858282 — TessellatingHeckler
– TessellatingHeckler, Commented Oct 26, 2016 at 22:31
Thanks a lot! Was stuck and as soon I posted my question I found an answer myself. — Roman
– Roman, Commented Oct 26, 2016 at 22:33

Roman · Accepted Answer · 2016-10-26 22:31:31Z

5

A little bit of further digging and I found the answer myself - need to use -argumentlist

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $args[0] -Force
} -argumentlist $serviceName

answered Oct 26, 2016 at 22:31

Roman

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Comments

Jaimil Patel · Accepted Answer · 2020-05-07 14:10:40Z

0

Another Solution
Please use the automatic variable '$using'.

$hostname1 = "myhost"
$serviceName = "myservice"
Write-Host "Hostname: $hostname1"
Write-Host "Service name: $serviceName"
Invoke-Command -ComputerName $hostname1 -ScriptBlock {
  Stop-Service -Name $Using:ServiceName -Force
}

edited May 7, 2020 at 14:10

Jaimil Patel

1,3639 silver badges13 bronze badges

answered May 7, 2020 at 10:09

Hany Mounir

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