The file names do not look consistent is that the case?
The 3rd file in the formula:
Looks strange. Can you explain that please? Especially the bit about ..."ALL Except..." I just can't see how all that works as a formula! It also seems to be the only formula that doesn't reference the 'main file'.
A list of the workbook names to be referenced would be useful and for ech workbook the names of the sheets in that workbook that you want to include.
In addition would you confirm that all the sheets are consistently laid out. i.e. the columns with the same data are always in the same place.
It would also help if you could upload an example of one of the workbooks.
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