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Get-PIPoint throws an "Object reference not set to an instance of an object" error

Question asked by LouisSalin on Mar 24, 2017
Latest reply on Mar 24, 2017 by LouisSalin

Hi everyone,

 

I've using a quick PowerShell script to get data out of a PI archive and I have recently started getting errors accessing PI Points. Trying to access an existing tag from a connected server results in an error and trying to access a non existing tag doesn't cause any error. This makes me think the issue is inside the SDK. Thank you for any help!

 

The following output should illustrate my issue:

 

------------

 

 

PS C:\Spark> $MyServer = Connect-PIDataArchive -pidataarchivemachinename <some server> -PIUsername "<some username>"

PS C:\Spark> $MyServer

 

Credential              : PIUser: <some username>

Identity                : <some username>

Principal               : <some username>

OperationTimeout        : 00:10:00

OpenTimeout             : 00:00:10

Behavior                : ReconnectBehavior: ConnectionPreference: Reconnect; BindingType: Reconnect

ProtectionLevel         : None

ServerVersion           : 3.4.405.1198

CurrentRole             : Name: <some server>; Type: UnSpecified

Address                 : pi://<some server>/

Directory               : OSIsoft.PI.Configuration.PISDKRegistryDirectoryProvider

Service                 : Service: Name = <some server>; Service Id = ce786160-1fa7-4364-8b8e-3186af1f89f0; type = Standalone

Configuration           : Name <some server>

LoginMode               : Legacy_Explicit

OperatingSystemUserName : <domain>\SparkCognition

SessionID               : 1

Name                    :

Connected               : True

Uid                     : 3bbc3112-5a7c-49ea-a24c-42368c51c792

DisconnectedByUser      : False

 

PS C:\Spark> $MyPIPointObject = Get-PIPoint "<some existing tag>" -connection $MyServer

Get-PIPoint : Object reference not set to an instance of an object.

At line:1 char:20

+ ... intObject = Get-PIPoint "<some existing tag>" -connecti ...

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

    + CategoryInfo          : NotSpecified: (:) [Get-PIPoint], NullReferenceException

    + FullyQualifiedErrorId : System.NullReferenceException,OSIsoft.PowerShell.GetPIPoint

 

PS C:\Spark> Get-PIPoint "<some tag that doesn't exist" -connection $MyServer

PS C:\Spark>

 

(doesn't output any error!!)

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