Error 5174

Hi -I am a first time poster

I have a word document with many bookmarks. I created the macro below to simply go to a bookmark in my file and insert it to a new file. If I open the file and click on the macro right away, it works. But after that, it throws the error 5174. Any help is appreciated. I am not very practiced in exploring these things in word

Private Sub CommandButton2_Click()
Windows("Master Documents file").Activate
Documents.Add Template:="Normal", NewTemplate:=False, DocumentType:=0
Selection.InsertFile FileName:="Master Documents file.docm", Range:= _
"Charter", ConfirmConversions:=False, Link:=False, Attachment:=False
Windows("Master Documents file").Activate


End Sub

Thanks for even reading and help would be sooooooooooo appreciated

Do we take it that the macro is in the document 'Master Documents File.docm'? That being the case

Code:

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Private Sub CommandButton2_Click()
Dim oDoc As Document, oSource As Document
Dim oRng As Range
    Set oSource = ThisDocument
    Set oDoc = Documents.Add(Template:="Normal")
    Set oRng = oDoc.Range
    oRng.FormattedText = oSource.Bookmarks("Charter").Range.FormattedText
    oSource.Activate
    Set oDoc = Nothing
    Set oSource = Nothing
    Set oRng = Nothing
End Sub

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That did it - Thanks Graham!:yes