title: ORA-04063: view "SYS.ALL_QUEUE_TABLES" has errors
body: <p>I tried to to see what tables are implemented in Oracle SQL Developer when I clicked "+" on the left hand side the window with this error has been shown, before I run this code:</p>
  
  <pre><code>BEGIN
     FOR cur_rec IN (SELECT object_name, object_type
                   FROM user_objects
                  WHERE object_type IN
                           ('TABLE',
                            'VIEW',
                            'PACKAGE',
                            'PROCEDURE',
                            'FUNCTION',
                            'SEQUENCE'
                           ))
   LOOP
    BEGIN
       IF cur_rec.object_type = 'TABLE'
       THEN
          EXECUTE IMMEDIATE    'DROP '
                            || cur_rec.object_type
                            || ' "'
                            || cur_rec.object_name
                            || '" CASCADE CONSTRAINTS';
       ELSE
          EXECUTE IMMEDIATE    'DROP '
                            || cur_rec.object_type
                            || ' "'
                            || cur_rec.object_name
                            || '"';
       END IF;
    EXCEPTION
       WHEN OTHERS
       THEN
          DBMS_OUTPUT.put_line (   'FAILED: DROP '
                                || cur_rec.object_type
                                || ' "'
                                || cur_rec.object_name
                                || '"'
                               );
       END;
    END LOOP;
  END;
  </code></pre>
  
  <p>SQL Developer stopped working, and I closed it, and when I run it again this error has been shown.</p>
  
  <p>Thanks for any solutions.</p>