Date: Tue, 11 Apr 2000 14:12:33 -0600 (MDT) Jim, I've found the problem to the strange boundary effect in the lowest to the ground layer of the vertical winds on the nests. It's a one line fix. Modify line 12 of the file MPP/RSL/parallel_src/vpp_stotndt.F so that it reads: define(PACK2D, `do ii = -IOR,IOR do jj = -IOR,IOR VECX_var (kk_x+1,ii,jj) = $1 (i+ii,j+jj) <<<<<< enddo enddo kk_x = kk_x + 1' ) The change is to add "+1" to kk_x in the first index of VECX_var. Once you make the change, it is only necessary to 'make mpp'. You do not have to recompile the entire code. (Unless you're superstitious). Note, this bug was probably affecting the rainc and rainnc fields near nest boundaries too, but since the influence of the boundaries is slight on these fields, it might not have shown up for a while if ever. This bug only affects the Fujitsu VPP. John