data _null_;
  file "c:\temp\Dinosaur\PutLogFile1.csv" dsd;
  if _n_=1 then put "Name,Age,Height";
  set sashelp.class;
  if age lt 12 then do;
    file log;
    put "Student age is less than 12 ... Please verify for " name= age=;
    file "c:\temp\Dinosaur\PutLogFile1.csv";
  end;
  put Name Age Height;
run;