export csv with personal column

hi,

i tried to export data of rdm in a xml file.

But i want to select only a few columns (domain, architecture, os and description).

My script is:

$s = Get-RDMSession | where {$_.ConnectionType -eq "RDPConfigured"} |

foreach { New-Object PSObject -Property @{

Name = $_.Session.ToString()

Domain = ($_.Session.GetProperty("MetaInformation", "Domain"))

Architecture = ($_.Session.GetProperty("MetaInformation", "Architecture"))

OS = ($_.Session.GetProperty("MetaInformation", "OS"))

Description = ($_.Session.GetProperty("", "Description"))

}};

## save to csv, the field names are used as column headers.

$s | export-csv c:\temp\sessions.csv -notypeinformation;

but i have a lot of errors like:

You cannot call a method on a null-valued expression.

At C:\Travail\RDM\script_ps\export-csv.ps1:2 char:14

+ foreach { New-Object PSObject -Property @{

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : InvalidOperation: (:) [], RuntimeException

+ FullyQualifiedErrorId : InvokeMethodOnNull

my version of rdm is 12.0.10.0

best regards

Vincent