  We prove that the number of complex invariant Einstein metrics on the flag
manifold $M_{n_1,n_2,n_3}=SO_{2(n_1+n_2+n_3)+1}/U_{n_1} \times U_{n_2} \times
SO_{2n_3+1}$ is equal to 132, except when the parameters $n_1, n_2, n_3$
satisfy one of some algebraic equations. Also the family of (real) non-flat
Ricci-flat metrics on the Euclidean spaces will be constructed using the method
of Inonu-Wigner contractions of Lie algebras.
