Dim loStream As New ADODB.StreamThis used to work well. It is not an option that is used often. So, it might be related since we moved the framework to 4.0. The files related are Interop.ADODB.dll and Interop.CDO.dll. The ones I have in the Bin directory are 87 and 48 KB dated from July 16, 2010. Is it possible those versions are not working well with the 4.0 framework?