Hi,
I hope anyone can give me some advice..

I have file Book3.xls (summary) which linked to Book2.xls (calculation), and
Book2.xls is linked to Book1.xls (source data).
I often make changes in Book1.xls.
Can I get the updated data when I open Book3.xls without having to open
Book2 ?
Is it possible for Excel to update its data without opening the "calculation"
file as stored in Book2.xls?

In fact, there are hundreds of Book2.xls for hundreds of different item
calculation, they made my head swam everytime I have to re-open them one by
one..
Help me please...

Thank you so much for everything..