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Hi, Kevin OHara
Another practical way is to use Evaluate Formula, which lets you follow a calculation one step at a time:
Select a cell that contains a suspicious formula.
On the Formulas tab, select Evaluate Formula.
Select Evaluate repeatedly and watch which cell references are substituted.
If the calculation eventually returns to the starting cell, you have found the loop.
For a large or complicated workbook, you can also use the Spreadsheet Inquire add-in. Select File > Options > Add-ins, choose COM Add-ins, and enable Inquire. Then open the Inquire tab and select Workbook Analysis. The report lists formulas, errors, warnings, and their cell locations, which can make hidden formula problems easier to isolate. Spreadsheet Inquire is available only in supported editions of Excel for Windows, including Microsoft 365 Apps for enterprise and equivalent editions.
It is also recommended that you check whether iterative calculation is enabled under File > Options > Formulas. If it is enabled unintentionally, Excel may continue calculating a circular formula instead of making the problem obvious. Turn it off temporarily, recalculate the workbook, and check which formulas produce a warning or unexpected zero. Thank you for your patience in reading, I hope this information has been helpful to you.
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