SD1149- Expected variable with missing value for all records

Hi

No data in expected variable but i have populated variable to minimize warning from Pinnacle validation. but still pinnacle give message for variable length that shows 0 if i have populated variable with no data how can be possible to change length. 

Variables                   Values                Pinnacle 21 ID                            Message                                                                                  Categroy

Variable, Length        USUBJID, 0        SD1149                    Expected variable with missing value for all records                             Presence

 Thank You