Dear All,

I am trying to use pyode to do some simple simulations but when I try to run the first tutorial script ( I get the following error

ODE Message 2: mass must be > 0 in dMassCheck() File ../../../../../ode/src/mass.cpp Line 49
0.00sec: pos=( 0.000,  0.000,  2.000)  vel=( 0.000,  0.000,  0.000)

ODE INTERNAL ERROR 1: assertion "bNormalizationResult" failed in _dNormalize4() [../../../../../include/ode/odemath.h]
Aborted (core dumped)

It appears that the error come from:

M.setSphere(2500.0, 0.05)

Can anyone advise?

I am running Ubuntu 13.10 and using the versions of python, libode and pyode from the repositories.

Thank you!