Problem calling a ref cursor that is in a stored procedure

Question

I have a stored procedure that returns a ref cursor as follows and I want to call it from another procedure in the same package. It compiles, but when I run it, it gets errors.
procedure procGetRefCursor(p_string in varchar2, p_int in integer, p_return out sys_refcursor) AS
l_subrefcursor l_refcursor;
begin
open l_subrefcursor for
SELECT myval
FROM mytab a
WHERE myval1 = p_string;
end procGetRefCursor;
The following code compiles, but when I run it it errors out on the fetch.
ERROR at line 1:
ORA-01001: invalid cursor
I also tried opening the cursor first and that does not compile. I also tried
fetch p_return.myval in l_myval
that does not compile
procedure callGetRefCursor(p_string in varchar2,p_int in integer) is
p_return sys_refcursor;
l_myval varchar2(100);
begin
procGetRefCursor(p_string, p_int, p_return);
loop
fetch p_return into l_myval;
dbms_output.put_line('myval '||l_myval);
exit when p_return%notfound;
end loop;
end;

Answer 1

Where is l_refcursor defined?
And why?
Aren't you using SYS_REFCURSOR?