TCellValue.IsError Method
Returns true if the cell has an error like #N/A! or #DIV0!. Note that this only applies to error values entered directly in the cell. If the cell has a formula that returns #N/A!, then the cell has a formula and the formula has an error. But the cell itself doesn't have an error.
Syntax
Unit: FlexCel.Core
function TCellValue.IsError: Boolean;