This does not seem to be an issue with Meep but rather with your version of autograd. The test fails here: int_types = {_np.int, _np.int8, _np.int16, _np.int32, _np.int64, _np.integer} - autograd is ...

MEEP is a library of functions for numerical simulations of how electromagnetic waves propagate and interact with various structures; it is a finite-difference time-domain solver of the Maxwell ...

Abstract: This paper describes Meep, a popular free implementation of the finite-difference time-domain (FDTD) method for simulating electromagnetism. In particular, we focus on aspects of ...