PENDING TS Variable not being read

[sccm1]

Hello all. For some reason my custom TS variable not being read. Could you guys please help me with it. Here is the TS Var>

%windir%\System32\WindowsPowerShell\v1.0\powershell.exe -command "& {$tsenv = New-Object -COMObject Microsoft.SMS.TSEnvironment; $tsenv.Value('OSDStartTime') = = Get-Date -f 's'}"

And here is my whole code

$RegKeyName = "OSDBuild"

# Set values
$tsenv = New-Object -COMObject Microsoft.SMS.TSEnvironment
$FullRegKeyName = "HKLM:\SOFTWARE\" + $regkeyname

# Create Registry key
New-Item -Path $FullRegKeyName -type Directory -Force -ErrorAction SilentlyContinue

# Get values
$InstallTime = Get-Date -Format G
$OSDStartTime = $tsenv.Value("OSDStartTime")
$AdvertisementID = $tsenv.Value("_SMSTSAdvertID")
$Organisation = $tsenv.value("_SMSTSOrgName")
$TaskSequenceID = $tsenv.value("_SMSTSPackageID")
$Packagename = $tsenv.value("_SMSTSPackageName")
$MachineName = $env:computername
$Installationmode = $tsenv.value("_SMSTSLaunchMode")

#Calculate time elapsed
$OSDTImeSpan = New-TimeSpan -start $OSDStartTime -end $installtime
$OSDDuration = "{0:hh}:{0:mm}:{0:ss}" -f $OSDTimeSpan

# Write values
new-itemproperty $FullRegKeyName -Name "Installed Date" -Value $InstallTime -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "OSD Start Time" -Value $OSDStartTime -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
New-ItemProperty $FullRegKeyName -Name "OSD Duration" -Value $OSDDuration -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "OrganisationName" -Value $Organisation -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "AdvertisementID" -Value $AdvertisementID -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "TaskSequenceID" -Value $TaskSequenceID -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "Task Sequence Name" -Value $Packagename -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "Installation Type" -Value $Installationmode -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
new-itemproperty $FullRegKeyName -Name "Computername" -Value $MachineName -Type STRING -Force -ErrorAction SilentlyContinue | Out-Null
New-ItemProperty $FullRegKeyName -Name "OS Version" -value (Get-CimInstance Win32_Operatingsystem).version -PropertyType String -Force | Out-Nul