Add attachments to email in Access

Hi,
I have some code from Ron De Bruin which I am trying to get to work with adding attachments. It breaks down at line 31 with the error "Type mismatch" yet I have declared the strings early on. see attached code;

Option Compare Database
Option Explicit

Public Sub EmailProdRprt()

    Dim OutApp As Object
    Dim OutMail As Object
    Dim ProdRprt1 As String
    Dim ProdRprt2 As String
    ProdRprt1 = "H:\All\Temp\ProdRprt.pdf"
    ProdRprt2 = "H:\All\Temp\ProdRprt.xlsx"

    Set OutApp = CreateObject("Outlook.Application")
    Set OutMail = OutApp.CreateItem(0)

    Dim strMsg As String
    Dim strTo As String
    Dim strCopyTo As String
    Set OutApp = CreateObject("Outlook.Application")
    Set OutMail = OutApp.CreateItem(0)

    strTo = "someone@somewhere.com;someoneelse@somewhereelse.com"
    strMsg = "Testing" 'Forms!frmShiftWarning.txtMsg
    strCopyTo = "copiedto@somewhere.com" 'Forms!frmShiftWarning.txtCopyTo
    With OutMail
        .To = strTo
        .cc = strCopyTo
        .BCC = ""
        .Subject = "Production Reports"
        .Body = strMsg
        .Attachments.Add ProdRprt1, ProdRprt2
        .Display
'        .Send
    End With

    On Error GoTo 0
    Set OutMail = Nothing
    Set OutApp = Nothing
End Sub

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As usual, any help is greatly appreciated.
Thanks