Several years ago, on a different PC and under a different set of IS
policies, I used the following code as part of a larger process to generate
automated emails from Excel and put images of an Excel range in each email
(customized by recipient).

I'm trying to adapt that code to do the same type of thing on a new project,
but with a totally different PC, and I'm having trouble getting it to run.
The current setup is Outlook 2003 on XP, which is the same as the other setup
where this code did work.

The error message I'm getting (see highlighted line below) is "compile
error: user defined type not defined" which suggests that there is no valid
reference registered.

I'd appreciate any suggestions- I'm stuck!
Thank you,
Keith

The checked references include:
Visual Basic for Applications
Microsoft Excel 11.0 Object Library
OLE Automation
Microsoft Office 11.0 Object Library
Microsoft Outlook 11.0 Object Library
Microsoft CDO for Windows 2000 library (which is strange, since I'm using XP?)

The top part of my code:

Function EmbeddedHTMLGraphicDemo(SendToName As String, SendFileCount As
Integer)
' Outlook objects
Dim objApp As Outlook.Application
Dim l_Msg As MailItem
Dim colAttach As Outlook.Attachments
Dim l_Attach As Outlook.Attachment
Dim oSession As MAPI.Session '<-- debug highlights here
' CDO objects
Dim oMsg As MAPI.Message
Dim oAttachs As MAPI.Attachments
Dim oAttach As MAPI.Attachment
Dim colFields As MAPI.Fields
Dim oField As MAPI.Field

'etc