Search for B → τv and B → Kvv̄

We report results of a search for B-->tau(nu) in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B-->tau(nu)) K+/-nu(nu))<2.4 x 10(-4) at 90% confidence level.