SQL Error: ORA-01417: a table may be outer joined to at most one other table
01417. 00000 -  "a table may be outer joined to at most one other table"
*Cause:    a.b (+) = b.b and a.c (+) = c.c is not allowed
*Action:   Check that this is really what you want, then join b and c first
           in a view.

create table test_081 (col_1  number);
create table test_082 (col_1  number);
create table test_083 (col_1  number);

insert into test_081 values (1);
insert into test_081 values (2);
insert into test_081 values (3);

insert into test_082 values (1);
insert into test_082 values (2);

insert into test_083 values (1);

select t1.col_1,t2.col_1,t3.col_1
from   test_081 t1
      ,test_082 t2
      ,test_083 t3
where  t1.col_1 = t2.col_1
and    t1.col_1 = t3.col_1(+)
and    t2.col_1 = t3.col_1(+);

ERROR at line 6:
ORA-01417: a table may be outer joined to at most one other table

select t1_col_1,t2_col_1,t3.col_1
from   (select vt1.col_1  t1_col_1
              ,vt2.col_1  t2_col_1
        from   test_081 vt1
              ,test_082 vt2
        where  vt1.col_1 = vt2.col_1) vw
      ,test_083 t3
where  vw.t1_col_1 = t3.col_1(+)
and    vw.t2_col_1 = t3.col_1(+);

  T1_COL_1   T2_COL_1      COL_1
---------- ---------- ----------
         1          1          1
         2          2