Issue with Start-ThreadJob ScriptBlock Unable to find powershell script

Question

I am using Start-ThreadJob and ScriptBlock to execute a powershell script in a new thread. It works fine on my local but on the preprod server, I am getting an error.

Code Block where I am initiating a new thread

Start-ThreadJob -InputObject $fileType -ScriptBlock {
          ./Functions/Download-FilesFromFTP.ps1 $args[0] $args[1]  $args[2] $args[3] $args[4] $args[5]
        } -ArgumentList $ftpServer,$user,$password,$completeSourceFolder,$completeStagingFolderPath,$completeLogFolderPath

As mentioned earlier, this code block works perfectly on my local. On Preprod env I get the following error when I display jobs using Get-Jobs command.

Powershell version on my local

Powershell version on preprod server

The version of the module ThreadJob is same on both servers

Answer 1

Start-ThreadJob runs the new thread with the same current location as the caller, which is unrelated to where the executing script is located.

If you want to refer to a file relative to the script's own location, use the automatic $PSScriptRoot variable, and refer to it in the thread script block via the $using: scope:

Start-ThreadJob -InputObject $fileType -ScriptBlock {
  & "$using:PSScriptRoot/Functions/Download-FilesFromFTP.ps1" @args
} -ArgumentList $ftpServer,$user,$password,$completeSourceFolder,$completeStagingFolderPath,$completeLogFolderPath

Note the use of @args in order to also pass all positional arguments, reflected in the automatic $args array, through as individual arguments to the target script via splatting.