Cannot convert null to type "System.DateTime". + CategoryInfo : InvalidArgument: (:) [], RuntimeException + FullyQualifiedErrorId : nullToObjectInvalidCast

• Question

• 

  

  0

  Sign in to vote

  Hi,

  Actually, im creating objects into $information variable with converted datetime format.

  $Information = New-Object -TypeName PSObject
  
  Add-Member -InputObject $Information -MemberType NoteProperty -Name DPName -Value $Server
  
  $LastLineFormatted = ($LastLine.Replace( '"',' ' )).Substring(158,36)
  
  $Z = $LastLineFormatted.Replace('.', ' ') | ConvertFrom-Csv -Delimiter ' ' -Header "Notrequired", "Time", "Notrequired2", "0", "1", "Date"
  
  Add-Member -InputObject $Information -MemberType NoteProperty -Name Time -Value ([datetime]"$($Z.Time)").ToString('hh:mm:ss')
  Add-Member -InputObject $Information -MemberType NoteProperty -Name Date -Value ([datetime]"$($Z.Date)").ToString('yyyy-MM-dd')
  
  
  
  } 

  Information variable looks like :

  PS DDD:\> $Information

  DPName               Time     Date     
  ------               ----     ----     
  ser.mydomain.net 03:55:24 2017-10-16

  After that, im trying to get local server time and substract from that information log time and get difference.

  $LocalServerDate = get-date
  
  foreach ($Difference in $Information){
  
  
  invoke-command -ComputerName $Difference.DPName -ScriptBlock {$LocalServerDate - [datetime]$($Difference.Time)}
  
  
  
  }

  
  

  Then im trying to run this code, im getting -

  Cannot convert null to type "System.DateTime".
      + CategoryInfo          : InvalidArgument: (:) [], RuntimeException
      + FullyQualifiedErrorId : nullToObjectInvalidCast

  but if im run just selection:

  {$LocalServerDate - [datetime]$($Difference.Time)

  im getting results:

  PS DBP:\> $LocalServerDate - [datetime]$($Difference.Time)

  Days              : 0
  Hours             : 13
  Minutes           : 59
  Seconds           : 13
  Milliseconds      : 98
  Ticks             : 503530989469
  TotalDays         : 0,582790497070602
  TotalHours        : 13,9869719296944
  TotalMinutes      : 839,218315781667
  TotalSeconds      : 50353,0989469
  TotalMilliseconds : 50353098,9469

  Why its not working when im trying invoke-command to get local server time and substract from [datetime]$($Difference.Time)?

  
  

  • Edited by TechSpark0 Monday, October 16, 2017 2:56 PM add

  Monday, October 16, 2017 2:56 PM