Bruce, did you change the return values of f and jac to be tuples instead of lists?  It crashes when I run it.

ticket1187demo.py:
-----
import scipy
from scipy.integrate import ode

print
print "scipy version:", scipy.__version__
print

y0, t0 = [1.0j, 2.0], 0

def f(t, y, arg1):
    return (1j*arg1*y[0] + y[1], -arg1*y[1]**2)

def jac(t, y, arg1):
    return ([1j*arg1, 1], [0, -arg1*2*y[1]])


r = ode(f, jac).set_integrator('zvode', method='bdf', with_jacobian=True)
r.set_initial_value(y0, t0).set_f_params(2.0).set_jac_params(2.0)
t1 = 10
dt = 1

while r.successful() and r.t < t1:
    r.integrate(r.t+dt)
    print r.t, r.y

-----

Run it:

$ python ticket1187demo.py

scipy version: 0.11.0.dev-96e39ec

0-th dimension must be 2 but got 0 (not defined).
rv_cb_arr is NULL
Call-back cb_f_in_zvode__user__routines failed.
Traceback (most recent call last):
  File "ticket1187demo.py", line 23, in <module>
    r.integrate(r.t+dt)
  File "/Users/warren/local_scipy/lib/python2.7/site-packages/scipy/integrate/_ode.py", line 333, in integrate
    self.f_params, self.jac_params)
  File "/Users/warren/local_scipy/lib/python2.7/site-packages/scipy/integrate/_ode.py", line 760, in run
    args[5:]))
SystemError: NULL result without error in PyObject_Call


Warren

On Wed, Nov 9, 2011 at 9:32 PM, Bruce Southey <bsouthey@gmail.com> wrote:

On Wed, Nov 9, 2011 at 4:02 PM, Tony Yu <tsyu80@gmail.com> wrote:
> I just want to draw attention to the bug report in
> http://projects.scipy.org/scipy/ticket/1187. Basically, scipy.integrate.ode
> takes a function as input, and the error occurs if that function returns a
> tuple (instead of, e.g., a list).
>
> If there isn't a simple fix (I can't tell b/c the error occurs within
> C-code, which I'm not at all proficient in), then I think this should print
> a more informative error message.
>
> Best,
> -Tony
>

There are 2 full releases and an release candidate since Scipy 0.7.2
was released (2010-04-22).
So, could you please update your numpy and scipy installations accordingly?

Works for scipy.10.0.rc1 (last part below)

Bruce