Macro in Outlook to delete duplicate emails- - arrays

Question

Public Sub RemDups()
Dim t As Items, _
i As Integer, _
arr As Collection, _
f As Folder, _
parent As Folder, _
target As Folder, _
miLast As MailItem, _
mi As MailItem
Set parent = Application.GetNamespace("MAPI").PickFolder
Set target = Application.GetNamespace("MAPI").PickFolder
For Each f In parent.Folders
Set t = f.Items
t.Sort "[Subject]"
i = 1
Set miLast = t(i)
Set arr = New Collection
While i < t.Count
i = i + 1
If TypeName(t(i)) = "MailItem" Then
Set mi = t(i)
If miLast.Subject = mi.Subject And miLast.Body = mi.Body _
And miLast.ReceivedTime = mi.ReceivedTime Then
arr.Add mi
Else
Set miLast = mi
End If
End If
Wend
For Each mi In arr
mi.Move target
Next mi
Next f
End Sub
Set miLast = t(i) gives "Run-time error'440' Array index out of bounds
Please help

Answer 1

This is a modified version founded in the web (Blog ExcelandAccess)
This code let pick a folder to search and delete duplicate items.
Option Explicit
'Set a reference to the Microsoft Scripting Runtime from Tools, References.
Sub DeleteDuplicateEmailsInSelectedFolder()
Dim i As Long
Dim n As Long
Dim Message As String
Dim Items As Object
Dim AppOL As Object
Dim NS As Object
Dim Folder As Object
Set Items = CreateObject("Scripting.Dictionary")
'Initialize and instance of Outlook
Set AppOL = CreateObject("Outlook.Application")
'Get the MAPI Name Space
Set NS = AppOL.GetNamespace("MAPI")
'Allow the user to select a folder in Outlook
Set Folder = NS.PickFolder
'Get the count of the number of emails in the folder
n = Folder.Items.Count
'Check each email starting from the last and working backwards to 1
'Loop backwards to ensure that the deleting of the emails does not interfere with subsequent items in the loop
For i = n To 1 Step -1
On Error Resume Next
'Load the matching criteria to a variable
'This is setup to use the Sunject and Body, additional criteria could be added if desired
Message = Folder.Items(i).Subject & "|" & Folder.Items(i).Body
'Check a dictionary variable for a match
If Items.Exists(Message) = True Then
'If the item has previously been added then delete this duplicate
Folder.Items(i).Delete
Else
'In the item has not been added then add it now so subsequent matches will be deleted
Items.Add Message, True
End If
Next i
ExitSub:
'Release the object variables from memory
Set Folder = Nothing
Set NS = Nothing
Set AppOL = Nothing
End Sub
A better version is to find duplicate e-mails in other folder in recursive mode.