Error code:1414. Out or INOUT argument 2 for routine company.new_procedure be not a variable or new

1. Error description

16:27:36 call	new_procedure (20150112,1)	
Error code:1414. Out or INOUT argument 2 for routine company.new_procedure be not a variable or new pseudo-variable in before trigger0.063 Sec

2. Error reason

CREATE definer= ' root ' @ ' localhost ' PROCEDURE ' new_procedure ' (in ' departid ' int,out ' num ' int)
BEGIN

  Select Count (t.depart_name) into the num from T_department_info t where t.depart_id = Departid;
  

End

Call New_procedure (20150112,1);

3. Solutions

Call New_procedure (20150112, @depart_id);

Out parameter is a field in a database table

Select @depart_id as Depart_id_out;