Are you sure that only Office was upgraded? What is the Windows version?

>An Excel automation process that has worked dependably with Excel 2000 and
>2003 for over 3 years no longer works for a client on systems that have been
>upgraded to Office 2007 - but continues to work on their systems where
>Office 2003 is installed. The application works on my development system
>and on other systems here where Office 2007 is also installed.
>
>The error is "OLE error code 0x80010105: The server threw an exception."
>
>The code is:
>

>oX=Createobject("Excel.application")
>oBook= oX.Workbooks.Add() (fails on this line every time)
>

>Any thoughts?