Richard- I agree with Matthias. You'll need to provide us with your source code, and the GSL version, if you want us to help you. - Juan
2015-09-18 19:38 GMT+02:00 Richard Harke <paleopeng...@gmail.com>: > I have a set of ODE's I'm trying to solve. After I installed gsl, I built > and ran > the example, vanderpol.c. No problem. I then changed func and jac for my > problem, changed the number of eqs. to 4. The output was simply the > initial values repeated over and over. I put beak points in func and jac. > They are never called!? Is there possibly some simple explanation or am > I doomed to slog through the library code to find this? > > The eqs are: > dx/dt =xdot > dy/dt = ydot > d(xdot)/dt = a function of x, y,xdot, ydot > d(ydot)/dt = a function of x, y, xdot, ydot > > Thanks for any suggestion >