Set-NSLBServer fails with "Invalid nitro action or operation" on NS12.1 49.23.nc

[Invoke-Humor]

Running Set-NSLBServer fails with Invalid nitro action or operation on NS12.1 49.23.nc. This appears to be related to Update action error #16. I suspect this may be an issue with the other Set cmdlets in the module - at least on the newer versions of NetScaler.

Expected Behavior

There is no error and the operation completes successfully.

Current Behavior

Invoking Set-NSLBServer and specifying valid Sesssion, Name, and IPAddress parameters fails:

PS C:\> Set-NSLBServer -Session $session -Name 'servername' -IPAddress '10.0.0.1'

Invoke-RestMethod : { "errorcode": 1240, "message": "Invalid nitro action or operation", "severity": "ERROR" }
At C:\Users\user\Documents\WindowsPowerShell\Modules\NetScaler\1.7.0\Private\_InvokeNSRestApi.ps1:144 char:21
+         $response = Invoke-RestMethod @restParams
+                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

Possible Solution

The solution appears to be to remove -Action update from line 87 of Set-NSLBServer.ps1, for example:

_InvokeNSRestApi -Session $Session -Method PUT -Type nshostname -Payload $params # -Action update

Your Environment

• Module Version: 1.7.0
• Operating System: Windows 10 1803 Build 17134.706
• PowerShell Version: 5.1.17134.590
• NetScaler Version: NS12.1