How do I alter a link in excel depending upon a cell value

Hi,

I have a link that works fine:
='K:\Accounts\[1.xls]Sheet1'!F74

but I now want to change the referenced workbook based on a cell value...

I have tried:
='K:\Accounts\["&A1&".xls]Sheet1'!F74
but this returns #REF where A1 =1

Can you please advise? I am using Excel 2010

Many Thanks
martinibboAsked:
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martinibboConnect With a Mentor Author Commented:
Thank you all for the quick responses - although I am sure that the excel addin would work, I have many PC's accessing the program and there would need to be over 1000 links. The statement on your last link:  "Since data is being extracted from closed Excel files via an addin, performance of the workbook will take a hit.  Please try this on limited Excel files first." therefore concerned me greatly.

If the scale of my program was smaller then I would of course try it, or if the linked excel workbook could be open at the same time the indirect formula would work - so thank you.

Instead I have chosen to go with a very simple VBA code to generate the links, similar to this:

a = ActiveCell.Value 'where "a" referenced a workbooks name (e.g.1-100)
ActiveCell.Offset(0,1).FormulaR1C1 = "='K:\Accounts\[" & a & ".xlsx]Sheet1'!R1C1"
'then loop through relevant "a" list of workbooks
 
Thanks again!
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Shanan212Connect With a Mentor Commented:
Your file 1.xls has to be open when you try this

try this

=indirect("'K:\Accounts\["&A1&".xls]Sheet1'!F74")
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martinibboAuthor Commented:
The file must be closed as I have many links....

Can we encorporate the index function somehow??

Thanks
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Saqib Husain, SyedConnect With a Mentor EngineerCommented:
You might like to try the indirect.ext() function which works on closed files also. You would, however have to download and install the morefunc.xla addin for this
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martinibboAuthor Commented:
Briefly doing some research into morefunc.xla, there appears to be some compatability issues with Excel 2010 (upto 2007 supported) and some people experiencing the program to crash.

As multiple computers would be accessing this workbook - would I need to install the addin onto each computer?

Also can you recommend a "safe" website to download the addin from?

The link to:  http://www.get-digital-help.com/2010/05/12/extracting-unique-distinct-text-values-from-a-closed-workbook-in-excel-formula/ provides an interesting result close to what I want. Can this be adapted to suit my formula?

Many Thanks
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Saqib Husain, SyedConnect With a Mentor EngineerCommented:
I have not tried this but this web page shows that the addin has to be installed on 2010 in a manner different from the way it is done on prior versions

http://www.ashishmathur.com/tag/indirect-ext/

See if it works for you.

As far as the link you provided is concerned the file reference is hardcoded in the formula and cannot be variable so cannot use that.
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martinibboAuthor Commented:
Most suitable, without installing addins and without compromising performance
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