SQL & PL/SQL :: ORA-01417 / A Table May Be Outer Joined To At Most One Other Table

I use a table taht i call C where the value of a field ("Type") is always a concat of values coming from more than 2 tables (A et C)

select A.Numero, B.date, B.commentaire,C.Libelle
from A, B, C
where A.codeLibelle = C.codeLibelle
and CONCAT(A.Numero, CONCAT(A.DemNumero, C.Libelle)) = B.Type (+)

when i execute this statement, i obtain

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

I have another request where it works fine and where i have concat of fields from only a single table:

select A.Numero, B.date, B.commentaire,C.Libelle
from A, B
where CONCAT(A.Numero, A.DemNumero) = B.Type (+)

In the first request Oracle seems to not accept a join with more than 2 tables