Volatile INDIRECT

Dunno, sorry, I don't use it.

There is an option argument in INDIRECT.EXT to choose volatility:

=INDIRECT.EXT(Reference,Volatile,A1-Style,Mode)

http://xcell05.free.fr/morefunc/engl...direct.ext.htm

I think the the embedding of the addin does not work in 2007... so you can't share the workbook without having user install Morefunc too.

You could use VBA to rebuild the formulae as and when the sheet name is altered in Column A.

IMO you either need "hardwired" links or else you need Volatility given the otherwise implicit references.

As a final (possible) pointer...

Pending layout... if we assumed that on your summary sheet the formulae are listed adjacent to the sheet names and that presumably the formulae are identical per column then in theory...

Use row 3 to store each formula as a string with a "place holder" (ie some denotation) for sheet name ... this string could be applied to whichever row has had a sheet name change with the place holder substituted for the appropriate sheet name.

Such an approach would remove the volatility but would adapt as sheet names were altered ... (you've not as yet specified how A4:A150 is generated - manual or other means)

Embedding aside, if you used INDIRECT.EXT in non-volatile fashion, you could force a full recalc wihen the master sheet was selected, if the linked sheets don't change while you're not looking.

What I mean is say B4:B150 all presently use:

=INDIRECT("'"&$A4&"'!C12")

then in theory you could store the "master formula" in B3 which is in effect:

"='PLACEHOLDER'!C12"

where PLACEHOLDER represents the sheet variable (to be determined)

Then when the sheet names are altered you revise the formula accordingly, ie:

For Each rngCell in Range("B4:B150").Cells
    With rngCell
        .Formula = Split(Replace(Range("B3").Text, "PLACEHOLDER", Cells(.Row, "A").Value), """")(1)
    End With
Next rngCell

does that make sense ? very basic example of course.

(edit on an aside the use of quotations to encase the formula is not really advisable ... better perhaps to encase the master within an unusual char (ie something not used in your formulae) - eg: #='PLACEHOLDER'!C12# and amend VBA accordingly to split based on "#")