Symptoms
An _xlfn. prefix is displayed in front of a function in a formula. When the formula is calculated, it displays the #NAME? error value.
Cause
The Excel workbook contains a function that is not supported in the version of Excel that you are currently running.
Resolution
Remove the unsupported functions, or if possible, replace the unsupported functions with supported functions.
Note: These functions are available if you have a Microsoft 365 subscription. Find your Office version.
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