I have a vb6 app that uses the MapPoint control. I recently recompiled the app (after several Windows updates). Now, only on Windows 2003 servers, whenever I load the form in my app that contains the MP Control, I receive the vb msgbox with "Run-time error '16391'". I have tried re-compiling the app on an XP Pro machine, a 2000 Server and a Win 2K box. The app that was compiled on the win 2K does NOT exhibit the error when run on a Windows 2003 server. This would lead me to believe that something in the Windows update for XP and/or 2000 server has introduced some incompatibility. Has anyone else seen this behavior?