No module named rhs102040

[Yonato]

While trying to run the example-landau-zener notebook, I'm getting an ImportError

f:\Users\user\Anaconda2\envs\qc27\lib\site-packages\qutip\sesolve.pyc in _sesolve_list_str_td(H_list, psi0, tlist, e_ops, args, opt, progress_bar)
    388         code = compile('from ' + config.tdname + ' import cy_td_ode_rhs',
    389                        '<string>', 'exec')
--> 390         exec(code, globals())
    391         config.tdfunc = cy_td_ode_rhs
    392 

f:\Users\user\Anaconda2\envs\qc27\lib\site-packages\qutip\sesolve.pyc in <module>()

ImportError: No module named rhs102040

Any ideas why this happens?