Can't instantiate a COM object written in C# from VBA (VB6 ok)

Question

Using VS 2008, here is my COM object

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Wi         


        

Answer 1

rc1 is correct in that this is a .net error, thrown when Office can't decide which version of the Framework to use. However, Office isn't throwing a wobbly simply because it's spoilt for choice. There is a bug in how Office 2003 interacts with .net 2.0.

Installing the fix from Microsoft (KB908002) is a more flexible way of solving the problem than by forcing Excel to run in a particular version of .net.

See also: http://www.biopdf.com/guide/trouble_shoot_microsoft_office_2003.php