Formula Issues

Beth Faircloth
edited 12/09/19 in Smartsheet Basics

Hi Everyone,

I am trying to enter the formula =NETDAYS([Date Submitted]294, [Pre-Site Survey Request Date]294). I receive an amount as long as there is a date in the columns. However, if one of the cells is blank I receive the #INVALID DATA TYPE error. How can I get the =NETDAYS to return a zero if one of the cells is blank.