PLS-00201: identifier 'CURSOR' must be declared

Question

I saw that have many similar questions here in stackoverflow but no one answer my question.

Where is the problem ?

CREATE OR REPLACE
PROCEDURE "PR_TESTE"( sl_cursor OUT SYS_REFCURSOR)  
IS
    stm varchar(30000);
BEGIN
    stm := 'SELECT * from tb_device_type';
    OPEN sl_cursor FOR  stm ;
END;

Answer 1

There is no problem in your code. The problem could be in the function/proc calling this procedure. Make sure that the cursor is defined there. I replaced your table tb_device_type to tab. This snippet works fine.

CREATE OR REPLACE
PROCEDURE "PR_TESTE"( sl_cursor OUT SYS_REFCURSOR)  
IS
    stm varchar(30000);
BEGIN
    stm := 'SELECT * from tab';
    OPEN sl_cursor FOR  stm ;
END;

-----
declare
  l_cur  sys_refcursor;
  l_tname tab.tname%type;
  l_tabtype tab.tabtype%type;
  l_clusterid tab.clusterid%type;
begin
  pr_teste(l_cur);
  loop
    fetch l_cur into l_tname, l_tabtype, l_clusterid;
    exit when l_cur%notfound;
    dbms_output.put_line(l_tname);
  end loop;
end;

Answer 2

Oracle 11g - Running PL/SQL Cursors

and

Oracle Cursors