Invalid tally score "pulse height"

I’m trying to use the example gamma detector (openmc-notebooks/gamma-detector.ipynb at main · openmc-dev/openmc-notebooks · GitHub) and I’m getting the error “Invalid tally score “pulse-height”. See the docs for details: https://docs.openmc.org/en/stable/userguide/tallies.html#scores”, and the link leads to a list of scores that include “pulse-height”. What could be causing this error?

Thanks.

This might be due to the version of openmc as pulse tallies are quite new. The latest version of openmc is 0.14.0 which version do you have. You can find out with

openmc --version

I was running an older version, updating fixed it. Thank you!