WORKAROUND
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To work around this problem, use one of the following methods.
Method 1
Make the custom function volatile. To do this, add the following line of
code to the custom function:
Application.Volatile
NOTE: A volatile function is recalculated every time that the worksheet is
recalculated. Making your custom function volatile may decrease the
performance of your worksheet.
Method 2
Add to any formula that refers to a cell that contains a custom function.
To do this, add the following to the formula:
For example, if your worksheet contains a custom function in cell A1, and
cell B1 contains the following formula
change the formula in cell B1 to the following:
NOTE: When you make this change to the formula in cell B1, cell B1 is
recalculated every time that the worksheet is recalculated.
Method 3
Press COMMAND+SHIFT+F9 to recalculate the values in the entire workbook.