Example fails with: No hierarchy column in input file

[PhilipDeegan]

Following the example on some caliper files: https://llnl-hatchet.readthedocs.io/en/latest/analysis_examples.html#read-in-a-caliper-cali-file

Fails with above error

we can see here

That a "path" is expected.

I believe this example used to work sometime ago when I tried it. It's not obvious to me how the example should be changed to have a path, but I am open to suggestions to test them

Hatchet was installed via pip for python 3.12.2

Thanks