The parameter login/no_automatic_user_sapstar by default is set to 1. With this value, you can't login to SAP Instance using the sap* user.

To activate the login with sap*, be carefull with that?

1 - Set the value of parameter login/no_automatic_user_sapstar to 0 in both the profile.

2 - Restart your SAP Instance to take effect

3 - Connect to the database to delete the user SAP* if it exists.

sqlplus / as sysdba

SQL> Delete from SAPSR3.USR02 where MANDT='<Client>’ and BNAME=’SAP*’;

4 - Now you can login sap* user ID and default password PASS.

5 - When you finish your work, put back the parameter, or create SAP* with complex password.