Cannot process argument transformation on parameter ‘VARName’.

During one of my adventures into the world of PowerShell I came across the following error:

Cannot process argument transformation on parameter ‘Environment’. Cannot convert value “System.Xml.XmlElement” to type “System.Xml.XmlDocument”. Error: “The specified node cannot be inserted as the valid child of this node, because the specified node is the wrong type.”

First I’ll explain what I’m trying to do.

I’ve got a PowerShell function that takes xml as a parameter

function Get-XmlData

{

param(
[xml]$XmlData
)

begin

{

$name = XmlData.Name

}

process

{

}

end

{

}

 

}

Then I’m calling the above function

[xml]$somexml = …

Get-XmlData -XmlData $somexml

This is where the above error appears.

Solution

I came across a solution here:

http://stackoverflow.com/questions/18040841/passing-an-xmlelement-to-a-background-job-in-powershell

After a bit of trying out I found an easier solution:

In my function I changed my Parameter to the type of string

   param(
[string]$XmlData
)

and then within my function I convert the string into Xml.

[xml]$XmlDataXml = $XmlData

Pieter Veenstra

Is your business still running on paper trails, sprawling Excel files, or ageing Access databases? There's a better way — and I can show you exactly what it looks like. I'm the Technical Director of Vantage 365, a Microsoft solutions consultancy working with clients across the UK, the Netherlands, and worldwide. For over 30 years I've been turning messy, manual business processes into clean, automated systems that save time, reduce errors, and give teams the visibility they need to make better decisions. SharePains is not just any blog run by a Microsoft MVP. Have you ever used Try-Catch in Power Automate? The original post about Try-Catch in Power Automate can still be found on this site, https://sharepains.com/2018/02/07/try-catch-finally-in-power-automate-flow/ Or have you ever used the Pieter’s method to avoid variables and speed up your flows? https://sharepains.com/2020/03/11/pieters-method-for-advanced-in-flows/ You can contact me using contact@sharepains.com

Pieter Veenstra

Is your business still running on paper trails, sprawling Excel files, or ageing Access databases? There's a better way — and I can show you exactly what it looks like. I'm the Technical Director of Vantage 365, a Microsoft solutions consultancy working with clients across the UK, the Netherlands, and worldwide. For over 30 years I've been turning messy, manual business processes into clean, automated systems that save time, reduce errors, and give teams the visibility they need to make better decisions. SharePains is not just any blog run by a Microsoft MVP. Have you ever used Try-Catch in Power Automate? The original post about Try-Catch in Power Automate can still be found on this site, https://sharepains.com/2018/02/07/try-catch-finally-in-power-automate-flow/ Or have you ever used the Pieter’s method to avoid variables and speed up your flows? https://sharepains.com/2020/03/11/pieters-method-for-advanced-in-flows/ You can contact me using contact@sharepains.com