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?](http://stackoverflow.com/questions/36328690/how-do-i-pass-variables-with-the-invoke-command-cmdlet) — user4003407, Oct 26 '16 at 22:24
http://stackoverflow.com/questions/36339616/ and http://stackoverflow.com/questions/13036327/ and http://stackoverflow.com/questions/37858282/ — TessellatingHeckler, Oct 26 '16 at 22:31
Thanks a lot! Was stuck and as soon I posted my question I found an answer myself. — Roman, Oct 26 '16 at 22:33

score 4 · Answer 1 · answered Oct 26 '16 at 22:31

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

score 0 · Answer 2 · edited May 07 '20 at 14:10

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 07 '20 at 14:10

Jaimil Patel

1,301
6
13

answered May 07 '20 at 10:09

Hany Mounir

1
2

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

2 Answers2