Error: Make the list separator and the decimal separator... (due to same symbol)

Error:


Make the list separator and the decimal separator different before calculating.

Cause:


The character used for the List Separator is the same as the Decimal Symbol.
NOTE: Characters used as a list separator or decimal symbol depend upon the country that is selected in the Windows Control Panel.

Solution:


Open the 'Regional Settings' icon from the 'Control Panel', and make sure that the list separator and the decimal symbol are different.