Try enabling one of the Excel Add-ins. Solver for instance.

JCS wrote:

Good Morning All,

I have Excel 2007 loaded on my desktop. When I launch an Excel workbook
whether from my Desktop or from Windows Explorer, only Excel launches but
not the workbook itself. If I leave Excel up and I launch the workbook again
it displays. Has anyone ever seen this, and if so, is there a solution for
it?

Many thanks in advance!
John