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Dear List, I build a Modell for solving a system of differential equations and then system is stiff. I have to simulate a maximum timstep of 1 s in order to get a result with thr SOLVER 0. When I use The SOLVER 1 (thus Powell's method) the result is just a straight line thus somthing like y=const. I therefor assume that the programation of the fortran code has to be adapted in order two use the SOLVER 1, but I have no idea how??? Further more I wondered what the two solvers actually do exsactly. The problem is that I have to create quite a big Modell and am not sure which solver two use. I am greatful for any help. Max Werlein Express yourself instantly with MSN Messenger! MSN Messenger |