I am trying to use the single dataset LightRay module but I am running into an issue.

Whenever I use the data_filename parameter, which I believe is necessary for use with AbsorptionSpectrum, I receive the following error.

TypeError: Object dtype dtype('O') has no native HDF5 equivalent

This error does not occur when I run the cookbook example so I am a bit lost as to what to do.

I am running the latest stable version on anaconda and have tried both h5py 2.7 and 2.6.

The simulation is a cosmological Enzo simulation.

I have also tried using the nightly dev build which changes the error from being on write to being on load with the following error.

AttributeError: 'str' object has no attribute 'astype'

from line 326 in _restore_light_ray_solution

self.parameters[ksp3] = self.parameters[ksp3].astype(str)

When using python 2.7 the error is the same but with 'unicode' instead of 'str'.

Any help would be greatly appreciated.

Thanks,