object outer does not exist

I have been trying to execute this procedure but it is giving this error and I have no idea what is causing it. Its been 2 days and I am still stuck in it. Basically, the procedure should run the query and store the result in a new table. Below is the error I am getting.

ORA-06564: object OUTER does not exist ORA-06512: at "HR.RPG", line 17 ORA-06512: at line 1

and this is my procedure code:

create or replace procedure "rpg"

is

  v_full_name VARCHAR2(500);
  sal varchar(200);
  jobid varchar(100);
  cpct varchar(50);
  mgid varchar(25);
  did varchar(20);
  cid varchar(20);
  rid varchar(20);
  lid varchar(20);

  Begin

  execute immediate 'create table resquery as
  (
  select HR.EMPLOYEES.FIRST_NAME||'' ''||HR.EMPLOYEES.LAST_NAME AS 
 Full_Name,HR.EMPLOYEES.SALARY as sal,HR.EMPLOYEES.JOB_ID as ji,
 HR.EMPLOYEES.COMMISSION_PCT as cmpct,HR.EMPLOYEES.MANAGER_ID as 
 mgid,HR.EMPLOYEES.DEPARTMENT_ID as dep,HR.COUNTRIES_EXTERNAL.COUNTRY_ID as 
 country,HR.DW_REGION.R_ID as region,
 HR.LOCATIONS.LOCATION_ID as loc
 from HR.EMPLOYEES
 join HR.DEPARTMENTS ON 
 HR.EMPLOYEES.DEPARTMENT_ID=HR.DEPARTMENTS.DEPARTMENT_ID
 join HR.LOCATIONS    ON HR.DEPARTMENTS.LOCATION_ID=HR.LOCATIONS.LOCATION_ID
 join HR.COUNTRIES_EXTERNAL ON     HR.LOCATIONS.COUNTRY_ID=HR.COUNTRIES_EXTERNAL.COUNTRY_ID
 join HR.DW_REGION    ON HR.COUNTRIES_EXTERNAL.REGION_ID=HR.DW_REGION.R_ID
 where HR.COUNTRIES_EXTERNAL.COUNTRY_ID=''US''
 AND trunc(HR.EMPLOYEES.HIRE_DATE) BETWEEN     TO_DATE(''16/08/2002'',''DD/MM/YYYY'') AND 
 TO_DATE(''07/12/2007'',''DD/MM/YYYY''))';

  end;
  /