A JOIN predicate was specified with an OUTER JOIN indicator (+). Using this OUTER JOIN indicator you can desribe a LEFT OUTER JOIN only.
Example
SELECT ... FROM table_a, table_b, table_c
WHERE table_a.column_a = table_b.column_b(+)
AND table_c.column_c = table_b.column_b(+)
Change the SQL statement using ANSI syntax.
Example
SELECT ... FROM table_a
LEFT OUTER JOIN table_b ON table_a.column_a = table_b.column_b
RIGHT OUTER JOIN table_c ON table_c.column_c = table_b.column_b