SQL Developer Data Modeler

This is my error;
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SQL> @test.sql
DBMS_OUPUT.PUT_LINE('Status: ' || status);
*
ERROR at line 12:
ORA-06550: line 12, column 7:
PLS-00201: identifier 'DBMS_OUPUT.PUT_LINE' must be declared
ORA-06550: line 12, column 7:
PL/SQL: Statement ignored
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Here’s my test script;
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SET SERVEROUTPUT ON SIZE 1000000

DECLARE
CURSOR def_p IS SELECT * FROM emp_payment_method_tb;
status NVARCHAR2(100) := 'Mask for payment method DAT file location complete';

BEGIN
FOR i IN def_p
LOOP
UPDATE emp_payment_method_tb
SET default_path=(SELECT DBMS_RANDOM.STRING('A', 20) default_path FROM DUAL);
END LOOP;
COMMIT;
DBMS_OUPUT.PUT_LINE('Status: ' || status);
END;
/
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If I remove the dbms_output line the script runs as expected. This is a sample table to test the script. The idea is to have the script mask certain parts of a database after a clone.
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SQL> select * from emp_payment_method_tb;

METHOD DEFAULT_PATH
-------------------- ----------------------------------------
ABC c:\admin
DEF g:\path\files


SQL> @test.sql

PL/SQL procedure successfully completed.

SQL> select * from emp_payment_method_tb;

METHOD DEFAULT_PATH
-------------------- ----------------------------------------
ABC fqaYYFCFcdjVuqoxXkGW
DEF fqaYYFCFcdjVuqoxXkGW
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If I enter the declaration and run this under the same user in the same schema, it runs as expected.
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SQL> set serveroutput on size 1000000
SQL> declare status NVARCHAR2(100) := 'Mask complete';
2 begin
3 dbms_output.put_line('Status:' || status);
4 end;
5 /
Status:Mask complete

PL/SQL procedure successfully completed.
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Any ideas to what I have done wrong greatly appreciated.