SQLPlus to run a .sql file

Dear experts,

I want to run a .sql which contains some sql code as shown.
However, when I run sqlplus command in windows command prompt.
The sqlplus can successfully login but hold to wait me to input for more?
Mysqlplus command:
"sqlplus username/password@somewhere @c:\oracle\replicate.sql"

I can only quit by pressing Ctrl+C, and I check the result that my script didn't run successfully.

Did my code in .sql missing something?

Many thanks

declare rc binary_integer; 
begin rc := sys.dbms_defer_sys.push(destination=>'DBBK', stop_on_error=>FALSE, delay_seconds=>0, parallelism=>0);
end;

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sqlpluserror.JPG