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Excel/Taking out duplicate values

Question
Following are columns F, G, H respectively.

='Sheet1'!A2 ='Sheet2'!A2 ='Sheet3'!A2
='Sheet1'!A3 ='Sheet2'!A3 ='Sheet3'!A3
='Sheet1'!A4 ='Sheet2'!A4 ='Sheet3'!A4
='Sheet1'!A5 ='Sheet2'!A5 ='Sheet3'!A5

Column I has the following code starting at I2 and the following formulae are in an array, which means type it into the cell, and then instead of hitting Enter, I, hit Ctrl-Shift-Enter.

=MAX(IF(G\$1:H\$30000=F2,F2,0))
=MAX(IF(G\$1:H\$30000=F3,F3,0))
=MAX(IF(G\$1:H\$30000=F4,F4,0))
=MAX(IF(G\$1:H\$30000=F5,F5,0))

This formula give me #REF! error.

But when i use it with the following values it works:

1009926   4051608   1014303
4001575   1012429   4107967
4107967   1009926   1014303
4097616   4073730   1014303
4064495   4026747   1019643

On sheet1 A2:A4 enter

111
222
333

On sheet2 A2:A4 enter

888
111
999

On sheet3 A2:A4 enter

444
555
666

On Sheet4, enter the following formulas:

in F2... =Sheet1!\$A2
in G2... =Sheet2!\$A2
in H2... =Sheet3!\$A2

then copy F2:H2 down through F2:H5.

On Sheet4, in cell I2, as an array, enter:

=MAX(IF(G\$1:H\$30000=F2,F2,0))

The I2 formula will return 111, just as it should. So what's the problem? In explaining the issue, be just as clear and precise as I've been in the answer above.
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Stuart Resnick

Expertise

I can answer questions relating to MS Excel formulas, or to programming with vba (Visual Basic for Applications) in the Excel environment. Please follow the following guidelines: your question should focus on one specific issue you want to learn. It's beyond the scope of this free service for me to create entire projects or complex vba solutions for you from scratch. You should be able to do most of the work yourself, and come here when you need help with a specific point you're stuck on. ALWAYS include a simple, concrete example illustrating what you want to learn. Explain this example in detail in the text of your question (what data is in which cells of which sheets, etc). Be very precise about the results you want, using this sample to make the logic clear. Always keep these examples SIMPLE. Never e.g. use 18 worksheets in your example if using 2 or 3 will do. Never use ranges like AI567:BB865 if using a range like A1:B3 will do. Thanks.

Experience

As a consultant, I've designed Excel tools since the 90s, working for the Federal Reserve Bank, AT&T, and (currently) Gap Inc.

Education/Credentials
My only "education" comes from 2 decades of doing spreadsheet/programming work, with major SF Bay Area corporations such as AT&T, Federal Reserve Bank, and Gap Inc.