hi, here i tried the coding for splitting the document file from the merged file,,
i found the problem that a new document is not creating

Dim str1 As String = TextBox1.Text
        Dim str2 As String = str1.Replace("[", "") & str1.Replace("]", "")
        Dim filename As Object = "f:\" & (Split(System.IO.Path.GetFileName(str2), ".")(0))
        Dim obj As Object
        Dim regobj As Object
        regobj = "\[ITS_*\]*\[/ITS\_*\]"
        Dim missing As Object = System.Reflection.Missing.Value
        Dim oFals As Object = False
        Dim oTru As Object = True
        Dim rang As Range
        Dim regx As Regex
        Dim test As String
        Dim unitobj As Object = word.WdUnits.wdStory
        Dim ext As Object = word.WdMovementType.wdExtend
        Dim savform As Object = word.WdSaveFormat.wdFormatDocument
        Dim matchcoll As MatchCollection
        obj = TextBox1.Text
        objdoc = objapp.Documents.Open(obj, missing, oFals, oTru)
        rang = objapp.ActiveDocument.Range
        rang.Find.ClearFormatting()
        rang.Find.Replacement.ClearFormatting()
        rang.Find.Execute(regobj, missing, missing, oTru, missing, missing, oTru)
        test = objapp.Selection.Text
        Do While rang.Find.Found
            ' objapp.Selection.HomeKey(unitobj, ext)
            Dim filenam As Object = "f:\" & (Split(System.IO.Path.GetFileName(str2), ".")(0))
            rang.Select()

            matchcoll = Regex.Matches(test, "^\[ITS_(.+?)\]")
            objapp.Selection.Cut()
            objdoc.Save()
            objdoc.Close()
            objapp = CreateObject("word.application")
            objapp.Visible = False
            objdoc = objapp.Documents.Add
            objapp.Selection.Paste()
            objdoc.SaveAs(filenam, savform)
            objdoc.Close()
            objdoc = objapp.Documents.Open(obj, missing, oTru, oTru)
            rang = objapp.ActiveDocument.Range
            rang.Find.ClearFormatting()
            rang.Find.Replacement.ClearFormatting()
            rang.Find.Execute(regobj, missing, missing, oTru, missing, missing, oTru)
            'End If
        Loop
        objdoc.Close()
        objapp.Quit()

You haven't specified the problem. What document file? What merged file?

You haven't said what it is you are trying to do.

You have no comments or white space in your code, therefore your code is essentially unreadable. Please do a little more work and repost.

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