Global scope variable is null within Scriptblock
powershell, powershell-3.0
Solution
You've got two scripts there, not one. The $TestScriptBlock is a separate script nested inside the main one, you send it to the remote computer, and that remote computer doesn't have $RemotePath configured. Try:
$ServerName = "test01"
$TestScriptBlock = {
$RemotePath = "C:\Test\"
copy-item -Path $RemotePath -Destination C:\backup\ -Force -Recurse
}
$CurrentSession = New-PSSession -ComputerName $ServerName
Invoke-Command -Session $CurrentSession -ScriptBlock $TestScriptBlock
(I would probably call it $LocalPath then, though)
Problem
Running the following code produces an error because the variable used for path is resolved as null event though it defined in the script: ``` $ServerName = "test01" $RemotePath = "C:\Test\" $TestScriptBlock = { copy-item -Path $RemotePath -Destination C:\backup\ -Force -Recurse } $CurrentSession = New-PSSession -ComputerName $ServerName Invoke-Command -Session $CurrentSession -ScriptBlock $TestScriptBlock ``` How do I call the $RemotePath defined in the parent script from within the ScriptBlock? I need to use $RemotePath in other parts of the parent script. Note, this value doesn't change, so it can be a constant. UPDATE -- WORKING SOLUTION You have to pass in variable as parameter to the scriptblock: ``` $ServerName = "test01" $RemotePath = "C:\Test\" $TestScriptBlock = { param($RemotePath) copy-item -Path $RemotePath -Destination C:\backup\ -Force -Recurse } $CurrentSession = New-PSSession -ComputerName $ServerName Invoke-Command -Session $CurrentSession -ScriptBlock $TestScriptBlock -ArgumentList $RemotePath ```