NDSolve differences between mathematica 8 and 9

*To*: mathgroup at smc.vnet.net*Subject*: [mg129567] NDSolve differences between mathematica 8 and 9*From*: Teresa <teresajane88 at gmail.com>*Date*: Fri, 25 Jan 2013 01:33:52 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net

Hello, I am using mathematica 9 and having some problems with a particular expression, but when I tried it on mathematica 8 it worked perfectly. My expression is: NDSolve[{D[T[n,z],n]+i 2 D[T[n,z],{z,2}]+z^2 T[n,z]==0,T[0,z]==1,Derivative[0,1][T][n,5]==0,Derivative[0,1][T][n,0]==0},T,{n,0,5},{z,0,5}] where i is the imaginary number, and on both I had a new window to work on, with nothing having been done previously on it. Mathematica 8 gave me this: {{T-> InterpolatingFunction[{{0.,5.},{0.,5.}},<>]}} and mathematica 9 gave me this: NDSolve::ndnum : Encountered non-numerical value for a derivative at n==0.`.>> Does anyone know what is going on here? I cannot use mathematica 8, as I do not have continual access to that machine. Thank you for your help.

**Follow-Ups**:**Re: NDSolve differences between mathematica 8 and 9***From:*Alex Krasnov <akrasnov@eecs.berkeley.edu>