I have added a draft Data Source to a model and i'm in the stage of finalizing Mappings. I have split two time stamp columns into Date and time(Hire date,Hire Time) and (Date of Birth, Birth Year). Now I'm creating a Calculated Column and added the formula [Birth Year] - [Hire Year]. Then I got the below error message.
"Formula Could not be computed:Function "-" expects parameter to be of type number " try rewriting the formula"
Please find the attached Screen shot.