Re: NDSolve Repeated convergence test failure

*To*: mathgroup at smc.vnet.net*Subject*: [mg47236] Re: NDSolve Repeated convergence test failure*From*: Steven Rey Ortiz <sro7516 at cs.tamu.edu>*Date*: Wed, 31 Mar 2004 02:59:22 -0500 (EST)*Organization*: Texas A&M University, College Station, Texas*References*: <c3uem8$9ub$1@smc.vnet.net> <c40sv5$mrs$1@smc.vnet.net> <c43833$efv$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Rob, Thanks for your help! This didn't work with Mathematica 4.2, but I just tried it on Mathematica 5 (at school) and it worked! Problem solved! Steve On Mar 27, 2004, at 11:26 AM, Rob Knapp wrote: If the equation is changing order in the middle of the integration, it is not possible to use an ordinary ODE method on it: all of those assume that the equtaion is in normal form. However, the DAE solver appears to work just fine. Try using the option SolveDelayed->True in NDSolve.