Why does Powershell say that my variables are empty or null?

PowerShell Help
1

Dear powershell community

I wanted to ask why my Script keeps on saying that these variables are empty or null. the following variables are affected:

$pcname = 'server01'
$RDdestfile = "C:\Scripts\Cert\Certificate_04.pfx"
$ThumbprintPath = 'RDS:\GatewayServer\SSLCertificate\Thumbprint'

As you can see, these Variables clearly have something in them.

Here is where I want to use them:

$RemoteSession = New-PSSession -ComputerName $pcname -Credential $cred
        Invoke-Command -Session $RemoteSession -ScriptBlock {
            Import-PfxCertificate -FilePath $RDdestfile -CertStoreLocation $CertLocation
            $certificate = Get-PfxCertificate -FilePath $RDdestfile
            Import-Module RemoteDesktopServices
            Set-Item -Path $ThumbprintPath -Value $certificate.Thumbprint -ErrorAction Stop
        }

 

I hope you can help me

Greetings

Martin

2

If you create your variables outside the scriptblock the scriptblock will not see them. To achieve this you can use the scope modifier “Using”. … like this:

$RemoteSession = New-PSSession -ComputerName $pcname -Credential $cred
        Invoke-Command -Session $RemoteSession -ScriptBlock {
            Import-PfxCertificate -FilePath $USING:RDdestfile -CertStoreLocation $CertLocation
            $certificate = Get-PfxCertificate -FilePath $USING:RDdestfile
            Import-Module RemoteDesktopServices
            Set-Item -Path $USING:ThumbprintPath -Value $certificate.Thumbprint -ErrorAction Stop
        }

I assume you will have to use the scope modifer for $CertLocation and $certificate as well.

3

Thank you for your reply!

I was able to get rid of the Error without putting the scope modifier for $certificate as well.

So thank you again for your help!

4

[quote quote=249062]If you create your variables outside the scriptblock the scriptblock will not see them. To achieve this you can use the scope modifier “Using”. …. like this:

$RemoteSession = New-PSSession -ComputerName $pcname -Credential $cred
Invoke-Command -Session $RemoteSession -ScriptBlock {
Import-PfxCertificate -FilePath $USING:RDdestfile -CertStoreLocation $CertLocation
$certificate = Get-PfxCertificate -FilePath $USING:RDdestfile
Import-Module RemoteDesktopServices
Set-Item -Path $USING:ThumbprintPath -Value $certificate.Thumbprint -ErrorAction Stop
} I assume you will have to use the scope modifer for $CertLocation and $certificate as well.

[/quote]
Can I somehow mark this question as the Answer?

5

That’s unnecessary. A simple “Thanks” as your last reply will do the job. :wink: