  We demonstrate that partner symmetries provide a lift of noninvariant
solutions of three-dimensional Boyer-Finley equation to noninvariant solutions
of four-dimensional hyperbolic complex Monge-Ampere equation. The lift is
applied to noninvariant solutions of the Boyer-Finley equation, obtained
earlier by the method of group foliation, to yield noninvariant solutions of
the hyperbolic complex Monge-Ampere equation. Using these solutions we
construct new Ricci-flat ultra-hyperbolic metrics with non-zero curvature
tensor that have no Killing vectors.
