An error occurs when browsing your SharePoint portal site's tree view list during the SharePoint process wizard. This error only occurs when SharePoint server is running on a separate server machine to that of 2003 Server.

Error Description:
“SharePoint portal Sites tree view list does not resolve”.

Cause: 2003 SharePoint web service is not installed on the SharePoint portal.

Install the SharePoint web service on the SharePoint Server.

Steps to follow:
1.  Run the 2003 installation on the SharePoint Server
2.  Choose “Custom Installation”
3.  Deselect all options except “Additional components”

4.  Click the “Next” button and complete the installation