SQL & PL/SQL

hi gurus,

i'm try'g to convert ansi sql to oracle sql.
but i'm getting an error. can u please let me know, if i can convert it or is it better to use ansi sql!
original code in ansi format::

select distinct bfc.NBR_SEQ, bfc.IDN_ENTITY, bfc.CDE_TYPE_ENTITY, n.CDE_STATUS,
         gec.idn_group as idn_parent_id, bfc.IDN_FUNC_BUSS,
         case when bfc.CDE_TYPE_ENTITY = 'P'  OR bfc.CDE_TYPE_ENTITY = 'A' then
            PKG_FW_NVGTR.GET_NAM_PAGE(bfc.IDN_ENTITY)
          else
            PKG_FW_NVGTR.GET_NAM_GROUP(bfc.IDN_ENTITY)
         end as ENTITY_NAM,
         p.Category, p.Display_Txt, p.show_in_nav, p.page_uri
  from
    T_BUSS_FUNC_ENTITY_CREF bfc
    inner join t_buss_func bf on bfc.idn_func_buss = bf.idn_func_buss
    inner join t_entity_prog_cref epc on bfc.idn_entity = epc.idn_entity and bfc.cde_type_entity = epc.cde_type_entity
    left outer join t_page p on bfc.idn_entity = p.idn_page
    left outer join t_group_entity_cref gec on bfc.idn_entity = gec.idn_entity and bfc.cde_type_entity = gec.cde_type_entity
    left outer join t_nvgtr n on bfc.idn_entity = n.idn_entity and bfc.cde_type_entity = n.cde_type_entity
  where
    BF.nam_func_buss = 'CP' AND--P_NAM_FUNC_BUSS and
    epc.cde_program in
      ( select p.cde_program from t_program p where p.nam_program in (
          SELECT * FROM TABLE (CAST(PKG_FW_NVGTR.FN_GET_ARRAY_FROM_COMMA_LIST('LC', ',') AS TYP_ARRAY))))
  order by
    bfc.NBR_SEQ;

tried to convert into oracle

SELECT DISTINCT bfc.NBR_SEQ,
             bfc.IDN_ENTITY,
             bfc.CDE_TYPE_ENTITY,
             n.CDE_STATUS,
             gec.idn_group as idn_parent_id,
             bfc.IDN_FUNC_BUSS,
             case when bfc.CDE_TYPE_ENTITY = 'P'  OR bfc.CDE_TYPE_ENTITY = 'A' then
                         PKG_FW_NVGTR.GET_NAM_PAGE(bfc.IDN_ENTITY)
                       else
                         PKG_FW_NVGTR.GET_NAM_GROUP(bfc.IDN_ENTITY)
             end as ENTITY_NAM,
             p.Category,
             p.Display_Txt,
             p.show_in_nav,
             p.page_uri
FROM    T_BUSS_FUNC_ENTITY_CREF bfc,
             T_BUSS_FUNC bf,
             T_ENTITY_PROG_CREF epc,
             T_PAGE p,
             T_GROUP_ENTITY_CREF gec,
             T_NVGTR n
WHERE bfc.IDN_FUNC_BUSS = bf.IDN_FUNC_BUSS
AND bfc.IDN_ENTITY = epc.IDN_ENTITY
AND bfc.CDE_TYPE_ENTITY = epc.CDE_TYPE_ENTITY
AND bfc.IDN_ENTITY(+) = p.IDN_PAGE
AND bfc.IDN_ENTITY(+) = gec.IDN_ENTITY
AND bfc.CDE_TYPE_ENTITY(+) = gec.CDE_TYPE_ENTITY
AND bfc.IDN_ENTITY(+) = n.IDN_ENTITY
AND bfc.CDE_TYPE_ENTITY(+) = n.CDE_TYPE_ENTITY
AND BF.nam_func_buss = 'CP' AND--P_NAM_FUNC_BUSS and
    epc.cde_program in
      ( select p.cde_program from t_program p where p.nam_program in (
          SELECT * FROM TABLE (CAST(PKG_FW_NVGTR.FN_GET_ARRAY_FROM_COMMA_LIST('LC', ',') AS TYP_ARRAY))))
               order by
                 bfc.NBR_SEQ;

error is

ORA-01417: a table may be outer joined to at most one other table

so how can i convert it?

thanks