A Circular Reference is created when a formula refers back to its own cell, either directly or indirectly.
Select Formulas tab -> Formula Auditing group -> Error Checking -> Circular Reference
Or
Find the address of Circular References in the Status Bar.
The reference of a Circular References appears only in the sheet where the Circular References is located. At the Status Bar of any other sheet in the workbook the words Circular References appear without the reference.
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