[ODE] Vector has zero size

[John Miles]

These usually mean that something has fallen through the world or been
blasted into outer space.

-- jm

> I find I am frequently getting the messages:
> ODE Message 2: vector has zero size (ode/src/odemath.cpp:120)
> and
> ODE Message 3: LCP internal error, s <= 0 (s=0.0000e+000)
>
> As I understand it, message 3 is telling me that the system is becoming
> unstable, and that I should be able to improve this with doubles and some
> fine tuning.
>
> As for message 2, is that saying that some vector has 0 magnitude or that
> it is somehow invalid?
>
> I'm receiving these messages after setting some desired joint velocities
> to "sort of" random values in the range of -10 to 10.
>