I can't get this script to produce output to the screen or a log file

Question

I can't get this script to produce output to the screen or a log file of the select statement results as they are executed.
SET SERVEROUTPUT ON size 100000
DECLARE
v_schema     Varchar2(50);
v_statement      Varchar2(500);
v_name varchar2(30);
v_id varchar2(8);
v_pwd varchar2(16);
v_acct varchar2(16);
CURSOR get_schemas IS
SELECT DISTINCT owner
FROM all_tables
WHERE table_name = 'USERID'
ORDER BY owner;
BEGIN
OPEN get_schemas;
LOOP
FETCH get_schemas INTO v_schema;
EXIT WHEN get_schemas%NOTFOUND;
          v_statement := 'SELECT name,usid,passwd,acctnum INTO v_name,v_id,v_pwd,v_acct FROM '||v_schema||'.userid';
          execute immediate v_statement;
          DBMS_OUTPUT.PUT_LINE('Name='||v_name||' ID='||v_id||' PW='||v_pwd||' AC='||v_acct);          
END LOOP;
CLOSE get_schemas;
END;
/

Answer 1

Duplicate post.
When I run this script nothing is output to the screen or spooled to a file