Powershell iControl error getting pool member statistics

I was able to figure out the issue. It had to do with using a none Common partition.

This code works

  (Get-F5.iControl).ManagementPartition.set_active_partition( (,"PARTITION_NAME") )
  Write-Host (Get-F5.iControl).ManagementPartition.get_active_partition() -ForegroundColor Yellow
  $address = New-Object -TypeName iControl.CommonAddressPort;
  $address.address ="/PARTITION_NAME/SERVE_RNAME"
  $address.port = 666;

  $state = New-Object -TypeName "iControl.CommonEnabledState" 
  $state = "STATE_DISABLED";


 (Get-F5.iControl).LocalLBPool.set_member_monitor_state( (, $pool_name), $address,(,$state));

  Write-Host "Waiting for current connections to drop to zero..." -ForegroundColor Yellow;


  $MemberStatisticsA = (Get-F5.iControl).LocalLBPool.get_member_statistics( ("/PARTITION_NAME/POOL_NAME"), $address);
      $MemberStatisticEntry = $MemberStatisticsA[0].statistics[0];
    $Statistics = $MemberStatisticEntry.statistics;
    foreach ($Statistic in $Statistics)
    {
      $type = $Statistic.type;
      $value = $Statistic.value;

      if ( $type -eq "STATISTIC_SERVER_SIDE_CURRENT_CONNECTIONS" )
      {
         just use the low value.  Odds are there aren't over 2^32 current connections.
         If your site is this big, you'll have to convert this to a 64 bit number.
        $cur_connections = $value.low;
        Write-Host "Current Connections: $cur_connections"
      }
    }