How to generate the spool number in SAP?

How to generate the spool number in SAP?

Go to the Transaction code  SP01 ->  Spool  request selection screen  will open(below), here  you have to choose the date(Date Created).  The should not be the same date. Then go to the Output Device select the  configured  printer  name from the list, then execute(F8).

Now  you can see the  spool numbers  (below)