Problem adding a namespace for customxml

[slaycock]

I'm trying to create a namespace in athe Custom XML part of a Word document.

I've done extensive googling but good documentation is thin to non-existent.

The following code is extracted from Microsoft's help pages on CustomXMLPrefixMappings

Sub addXMLNamespaceTest()

' https://msdn.microsoft.com/en-us/library/office/ff863518.aspx
Dim objNamespace As CustomXMLPrefixMapping
 
    objNamespace = CustomXMLPrefixMappings.AddNamespace(Prefix:="xs", NamespaceURI:="urn:invoice:namespace")
End Sub

but this gives a runtime error of object required and I can't figure out why.

A similar example found under the 'addnamespace' help (You have to add the XML to the CustomXMLPrefixMappings

https://msdn.microsoft.com/en-us/lib...ffice.15).aspx

Sub AddNamespacePrefix()
  
    Dim objCustomPrefixMappings As CustomXMLPrefixMappings
    Dim varCustomMapping As Variant
 
    ' Adds a custom namespace.
    varCustomMapping = objCustomPrefixMappings.AddNamespace("xs", "urn:invoice:namespace")
 
End Sub

Highlights the addNamespace term with the error 'Function or variable required'.

Can anyone assist with the correct syntax for adding a namespace.

If it helps I've tried the code below (with reference to https://www.w3schools.com/xml/xml_namespaces.asp )

and the xml parts are added under (no namespace) (1) and (no namespace (2) hence the investigation of .addNamsespace.

Sub testxmladd()

    ActiveDocument.CustomXMLParts.add XML:= _
        "<RCDP xmlns:a=""https://www.w3schools.com/furniture"">" & _
        "<a:arcprop id=""HeadingVisibilityP"">" & _
        "<a:visibility>True</a:visibility>" & _
        "<a:enabled>True</a:enabled>" & _
        "</a:arcprop>" & _
        "<a:arcprop id= ""HeadingVisibilityS"">" & _
        "<a:visibility>False</a:visibility>" & _
        "<a:checked>True></a:checked>" & _
        "</a:arcprop>" & _
        "</RCDP>"
    ActiveDocument.CustomXMLParts.add XML:= _
        "<RCDP xmlns:a=""https://www.w3schools.com/furniture"">" & _
        "<a:arcprop id=""HeadingVisibilityA"">" & _
        "<a:visibility>True</a:visibility>" & _
        "<a:enabled>True</a:enabled>" & _
        "</a:arcprop>" & _
        "<a:arcprop id= ""HeadingVisibilityR"">" & _
        "<a:visibility>False</a:visibility>" & _
        "<a:checked>True></a:checked>" & _
        "</a:arcprop>" & _
        "</RCDP>"

End Sub