Loop through pages, cut/paste into new document then save new document

Hello, I have a word document that is around 3000 pages long. I am trying to write a script that will go through the document, cut out the pages I need and paste them into a new document, then save the document with a file name.

I have the following working, but I have to set the start/end page number and file name each time manually.

Code:

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' works but manually has to be changed
Sub selectpages()


    Dim rgePages As Range
    Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=1
    Set rgePages = Selection.Range
    Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=8
    rgePages.End = Selection.Bookmarks("\Page").Range.End
    rgePages.Select
    Selection.Copy
    Selection.Delete
    Documents.Add 'Makes a new document
    Selection.PasteAndFormat wdPasteDefault 'Pastes in the content
    ActiveDocument.SaveAs FileName:="filename.docx"
    ActiveDocument.Close
   
End Sub

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What I would like to do is set up a multidimensional array that would have the start page, end page and filename all as elements in the array, but I am unsure how to write the array / call it. The document would be broken up into around 150 different files with anywhere from 10 to 200 pages in each file. Any suggestions on how to modify this to make it work?

Code:

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Sub ArrayTest()
    Dim pgArray(1, 2) As String
    Dim rgePages As Range
   
    pgArray(0, 0) = "1"
    pgArray(0, 1) = "8"
    pgArray(0, 2) = "moduleA.doc"
   
    pgArray(1, 0) = "9"
    pgArray(1, 1) = "75"
    pgArray(1, 2) = "moduleB.doc"
   
    ubx = UBound(pgArray, 1) + 1
   
    For j = 0 To ubx
     
        Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=pgArray(j, 0)
        Set rgePages = Selection.Range
        Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=pgArray(j, 1)
        rgePages.End = Selection.Bookmarks("\Page").Range.End
        rgePages.Select
        Selection.Copy
        Selection.Delete
        Documents.Add 'Makes a new document
        Selection.PasteAndFormat wdPasteDefault 'Pastes in the content
        ActiveDocument.SaveAs FileName:=pgArray(j, 2)
        ActiveDocument.Close
        Documents("MainDoc.docx").Activate
    Next
 
End Sub

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Code:

---

Sub ArrayTest()
Dim pgArray(1, 2) As String
Dim oRng As Range
Dim lngIndex As Long
Dim oDoc As Document
  pgArray(0, 0) = "1"
  pgArray(0, 1) = "8"
  pgArray(0, 2) = "moduleA.doc"
  pgArray(1, 0) = "9"
  pgArray(1, 1) = "75"
  pgArray(1, 2) = "moduleB.doc"
  For lngIndex = 0 To UBound(pgArray, 1)
    Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=pgArray(lngIndex, 0)
    Set oRng = Selection.Range
    Selection.GoTo What:=wdGoToPage, Which:=wdGoToAbsolute, Count:=pgArray(lngIndex, 1)
    oRng.End = Selection.Bookmarks("\Page").Range.End
    oRng.Copy
    Set oDoc = Documents.Add 'Makes a new document
    oDoc.Range.PasteAndFormat wdPasteDefault 'Pastes in the content
    oDoc.SaveAs FileName:=pgArray(oRng, 2)
    oDoc.Close
  Next
End Sub

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I get a Run-time error '13': type mismatch on

oDoc.SaveAs FileName:=pgArray(oRng, 2)

When I run the code, any idea why?

I think oRng should be replaced with lngIndex in that line.