*If settlement or maturity dates are not valid, Calci displays an error message.
+
*Settlement and maturity dates should be entered either in 'date format' or 'dates returned using formulas'. If dates are not valid, Calci displays an error message.
*If settlement date ≥ maturity date, Calci displays an error message.
*If settlement date ≥ maturity date, Calci displays an error message.
*'coupon' and 'yield' values must be greater than or equal to zero.
*'coupon' and 'yield' values must be greater than or equal to zero.