Hello community,   I'm a beginner SAS user ( version 9.4) and I'm trying to calculate age in days. I'm trying to change a text field to a numeric. Here's the formula that I'm using [ today() - input(ad.trans_date,10.) as age_in_days format yymmdd10.,]The error message says that it's an invalid string and has an invalid argument and missing values may be generated.  Below is the full code to my process.   proc sql; create table Annuity AS   select c.Cust_Uniqe_No as TaxIDSSN,   ad.Policy_No, upcase(compbl(trimn(ci.last_name)||', '||trimn(ci.first_name)||' '||trimn(ci.middle_name))) as customer_name,  ad.Trans_date, ad.Premium_Amt as Amount, f.Fund_Name as Product, today() - input(ad.trans_date,10.) as age_in_days format yymmdd10.,  upcase(compbl(trimn(ud.Last_Name)||", "||trimn(ud.First_Name))) as agent_name,   ad.Cancel_Date   From wealth.Appointment a inner join wealth.Annuity_Detail ad on a.Appnt_ID = ad.Appnt_ID inner join wealth.Customer c on c.Cust_ID = a.Cust_ID inner join wealth.Fund f on f.Fund_ID = ad.Fund_ID inner join wealth.Customer_Individual ci on c.Cust_id = ci.Cust_ID inner join wealth.User_Detail ud on ud.Adv_Id = a.Adv_Id Where (ad.policy_no in ('',' ') or ad.policy_no is null)   Order by ad.Trans_date; quit;   ... View more