Word document mysteriously write protected? - vbscript

Question

I am trying to do a find and replace operation on several Word documents in a folder. I wrote the following VBScript to do that:
Option Explicit
Dim Word, Document, FolderPath, FileSystem, FileList, File, Doc, InfoString
Const ReadOnly = 1
Const wdFindContinue = 1
Const wdReplaceAll = 2
Const wdOriginalDocumentFormat = 1
Set FileSystem = CreateObject("Scripting.FileSystemObject")
FolderPath = FileSystem.GetAbsolutePathName(".")
Set FileList = FileSystem.GetFolder(FolderPath).files
Set Word = CreateObject("Word.Application")
Word.Visible = False
Word.DisplayAlerts = False
For Each File in FileList
If LCase(Right(File.Name,3)) = "doc" Or LCase(Right(File.Name,4)) = "docx" Then
If File.Attributes And ReadOnly Then
File.Attributes = File.Attributes - ReadOnly
End If
Set Doc = Word.Documents.Open(File.Path,,True)
' find and replace stuff
End If
Next
Word.Documents.Save True, wdOriginalDocumentFormat
Word.Quit
MsgBox("Done")
Problem is, when it reaches the line Word.Documents.Save, a Save As dialog box always pops up. If I click Cancel, I get an error from Windows Script Host saying the file is write protected, even though it is not shown as write protected if I open the Properties dialog in File Explorer. If I click save, I am prompted to save all the other files too. What is the problem here?
I have a suspicion that it is caused by the Word documents being very old, like from the 1990s.

Answer 1

Set Doc = Word.Documents.Open(File.Path,,True)
and look at the docs from Object Browser.
Function Open(FileName, [ConfirmConversions], [ReadOnly], [AddToRecentFiles], [PasswordDocument], [PasswordTemplate], [Revert], [WritePasswordDocument], [WritePasswordTemplate], [Format], [Encoding], [Visible], [OpenAndRepair], [DocumentDirection], [NoEncodingDialog]) As Document
Member of Word.Documents
So the True says to open Read Only. This is Word's read only, nothing to do with the file.