matrix is close to singular or badly scaled. results may be inaccurate matlab

I am solving 6 ODE using numerical method that is Keller box method.. while i running this programm i got this error matrix is close to singular or badly scaled. results may be inaccurate matlab

[abhijit kulkarni]

I dont know about Keller box method. This happens when u r trying to inverse a matrix; whose inverse is not possible.

In ode , carefully check the values of system matrix ( A matrix elements). Are you clearly specifying ode equations?

I mean usually we do it like xdot=[x1dot; x2dot; x3dot];