Invoke-SwisVerb : Verb Orion.AlertSuppression.SuppressAlerts cannot unpackage parameter 0 of type System.String

Question

Import-Module SwisPowerShell

$OrionServer = 'localhost'
$cred = Get-Credential

$swis = Connect-Swis -Hostname $OrionServer -Credential $cred

$server = 'my-server'
$query = "SELECT Uri FROM Orion.Nodes WHERE SysName LIKE '" + "$server" + "%'"
$entityUris = Get-SwisData $swis $query
$entityUris = $entityUris |% {[string]$_}

Invoke-SwisVerb $swis Orion.AlertSuppression SuppressAlerts @($entityUris) 
 Trying to mute alerts on an object, using the code above and always receive the following error message: 
 Invoke-SwisVerb : Verb Orion.AlertSuppression.SuppressAlerts cannot unpackage parameter 0 of type System.String[]
At line:13 char:1
+ Invoke-SwisVerb $swis Orion.AlertSuppression SuppressAlerts @($entity ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 + CategoryInfo : InvalidOperation: (:) [Invoke-SwisVerb], FaultException`1
 + FullyQualifiedErrorId : SwisError,SwisPowerShell.InvokeSwisVerb

Martin_Crothers · Answer

Hi raymondakrawi , 
 Having PowerShell run as an administrator shouldn't be necessary. I'm thinking that it might be an issue with the formatting of the arguments. 
 This is what works for me: 
 # The formatting of the arguments as an Array (like below) is not necessary
Invoke-SwisVerb -SwisConnection $Swis -EntityName Orion.AlertSuppression -Verb SuppressAlerts -Arguments @(@($Uri), $StartTime, $EndTime)


# But the first argument, the entityUris, must be an Array:
Invoke-SwisVerb -SwisConnection $Swis -EntityName Orion.AlertSuppression -Verb SuppressAlerts -Arguments @($Uri), $StartTime, $EndTime


# As a bonus, this means that you can pass multiple entities on the same invoke, instead of having to run the invoke in a foreach loop. Example:
$Uris = @(
 'swis://orion.example.com/Orion/Orion.Nodes/NodeID=1234',
 'swis://orion.example.com/Orion/Orion.Nodes/NodeID=1235'
)
Invoke-SwisVerb -SwisConnection $Swis -EntityName Orion.AlertSuppression -Verb SuppressAlerts -Arguments @($Uris), $StartTime, $EndTime 
 
 I've found that if I look at the verb in SWQL Studio, I can see if the value is expected as a Array. You can find that here:

Even though it says that it's expecting a string, the XML is looking for an array. This is the "how to understand swql/api" that helped me out the most.

Invoke-SwisVerb : Verb Orion.AlertSuppression.SuppressAlerts cannot unpackage parameter 0 of type System.String

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