Kernel dies when reading UCN file on Mac

[mbakker7]

I am working on a Mac.
I am running MT3D and get a UCN file.
mf2005 and MT3D run fine.
I then create a UCN object and can get the times out of the UCN file (with the get_times() function). All good so far.
When I try to read all data (with the get_alldata() function), the Kernel dies.

Now get this: Running the exact same script on a Windows machine works fine.

Any thoughts where I should start looking for an error?
Incidentally, I have run the mt3d_1d example from the flopy website, and that works fine on my Mac.

[christianlangevin]

Presumably, the binary executables came from here? https://github.com/MODFLOW-USGS/executables

[mbakker7]

They sure did. And the mt3d_1d example works fine. I may start to modify this file with my input and see where the problems start occurring.