How to get node value of XML using function getElementsByTagName on VBScript?

Okay, this line of your code:

XMLTestReader.load(XML.XML_Teste.Document)

The load method of MSXML takes a filepath to an XML file as the argument. XML.XML_Teste.Document will return a DOM object that represents the XML, not the filepath. If you want you can pass in the actual file path to the XML file, but Document property of an XML checkpoint already return a DOM object like what you want. So your code could just be like this:

Sub XMLTest
Set nodeText = XML.XML_Teste.Document.getElementsByTagName("mod").item(0).text
BuiltIn.ShowMessage(nodeText)

I use python so hopefully that's all the correct syntax.