Brian - I'm starting an OLAP project and am having similar problems.  Did 
you ever get this resolved?  Would you mind sharing how you got it 
fixed?  I would also like to know how to do MDX with ADO.Net versus ADO 
2.7.  Have you attempted using ADO.Net yet?  I'm having a tough time 
finding ADO.Net/MDX/OLAP resources on the web.

Thanks!

> 
> I keep getting a COM exception error when I put the following code in a 
> VB.Net class and call it. The code bombs on the following line. Any 
ideas??
> I have the folloing references named fo the project.
> --Microsoft activex data objects(multidimensional) 2.7 library
> --Microsoft activex data objects 2.7 library
> --system
> --system.data
> --microsoft.visualbasic.compatibility
> --
> cat.let_ActiveConnection("Data Source=local;Provider=msolap;")
> 
> 
> -
>         Dim cat As New ADOMD.Catalog()
>         Dim cst As New ADOMD.Cellset()
>         Dim i As Short
>         Dim j As Short
>         Dim strServer As String
>         Dim strSource As String
>         Dim strColumnHeader As String
>         Dim strRowText As String
> 
>         '*--------------------------------------------------------------
---
> ------
>         '* Set Server to Local Host
>         '*--------------------------------------------------------------
---
> ------
>         strServer = "LOCALHOST"
> 
>         '*--------------------------------------------------------------
---
> ------
>         '* Set MDX query string Source
>         '*--------------------------------------------------------------
---
> ------
>         strSource = strSource & "SELECT "
>         strSource = strSource & "{[Measures].members} ON COLUMNS,"
>         strSource = strSource & "NON EMPTY [Store].[Store City].members 
ON 
> ROWS"
>         strSource = strSource & " FROM Sales"
> 
>         '*--------------------------------------------------------------
---
> ------
>         '* Set Active Connection
>         '*--------------------------------------------------------------
---
> ------
>         cat.let_ActiveConnection("Data Source=local;Provider=msolap;")
>