“Runtime error Exception has been thrown by the target of an invocation” from Script task

Question

I have a SSIS package with a script task, I get the following error when i try to run it in my local system. It works fine for my collegues as well as in production. However

Answer 1

This is just a different situation and not intended to be the end all be all solution for everyone.

When I was installing my DLLs into the GAC I forgot to run my script as Administrator and the script ran silently without error as though it was working.

I felt really dumb when I realized that's what I did wrong. Hopefully this can help prevent other people from wasting time on something so silly.

For reference this is what I use for installing my DLLs into the GAC and I modified it to tell me when I am not running it as Administrator now:

#https://superuser.com/questions/749243/detect-if-powershell-is-running-as-administrator
$isAdmin = ([Security.Principal.WindowsPrincipal] `
  [Security.Principal.WindowsIdentity]::GetCurrent() `
).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)

if($isAdmin -eq $false)
{
    Write-Host "You have to run this script as Administrator or it just won't work!" -ForegroundColor Red

    return;
}

$strDllPath = "C:\PathToYourDllsHere\"

#Note that you should be running PowerShell as an Administrator
[System.Reflection.Assembly]::Load("System.EnterpriseServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")            
$publish = New-Object System.EnterpriseServices.Internal.Publish            


$arr = @(
    "YourDLL01.dll",
    "YourDLL02.dll",
    "YourDLL03.dll"
)

get-date

foreach($d in $arr)
{
    $p = ($strDllPath + $d);

    $p

    $publish.GacInstall($p);
}

#If installing into the GAC on a server hosting web applications in IIS, you need to restart IIS for the applications to pick up the change.
#Uncomment the next line if necessary...
#iisreset

Credit for how to determine if your PowerShell script is running in Admin mode or not: https://superuser.com/questions/749243/detect-if-powershell-is-running-as-administrator