AttributeError: module 'julia.ReactionMechanismSimulator' has no attribute 'EmptyHenryLawConstant'

[rwest]

Bug Description

Running RMG gives an AttributeError: module 'julia.ReactionMechanismSimulator' has no attribute 'EmptyHenryLawConstant'
(Solution is below. Sharing for posterity)

How To Reproduce

Steps to reproduce the behavior.

From the RMG-Py/examples/rmg/minimal folder running python-jl $RMGpy/rmg.py input.py I would get (after some time...)

Traceback (most recent call last):
  File "/opt/miniconda3/envs/rmg_env5/lib/python3.7/site-packages/julia/pseudo_python_[cli.py](http://cli.py/)", line 308, in main
    python(**vars(ns))
  File "/opt/miniconda3/envs/rmg_env5/lib/python3.7/site-packages/julia/pseudo_python_[cli.py](http://cli.py/)", line 59, in python
    scope = runpy.run_path(script, run_name="__main__")
  File "/opt/miniconda3/envs/rmg_env5/lib/python3.7/[runpy.py](http://runpy.py/)", line 263, in run_path
    pkg_name=pkg_name, script_name=fname)
  File "/opt/miniconda3/envs/rmg_env5/lib/python3.7/[runpy.py](http://runpy.py/)", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "/opt/miniconda3/envs/rmg_env5/lib/python3.7/[runpy.py](http://runpy.py/)", line 85, in _run_code
    exec(code, run_globals)
  File "/Users/rwest/Code/RMG-Py/[rmg.py](http://rmg.py/)", line 118, in <module>
    main()
  File "/Users/rwest/Code/RMG-Py/[rmg.py](http://rmg.py/)", line 112, in main
    rmg.execute(**kwargs)
  File "/Users/rwest/Code/RMG-Py/rmgpy/rmg/[main.py](http://main.py/)", line 717, in execute
    self.initialize(**kwargs)
  File "/Users/rwest/Code/RMG-Py/rmgpy/rmg/[main.py](http://main.py/)", line 522, in initialize
    self.reaction_model.add_species_to_edge(spec)
  File "/Users/rwest/Code/RMG-Py/rmgpy/rmg/[model.py](http://model.py/)", line 1184, in add_species_to_edge
    self.edge.phase_system.phases["Default"].add_species(spec)
  File "/Users/rwest/Code/RMG-Py/rmgpy/rmg/[reactors.py](http://reactors.py/)", line 288, in add_species
    spec = to_rms(spc)
  File "/Users/rwest/Code/RMG-Py/rmgpy/rmg/[reactors.py](http://reactors.py/)", line 594, in to_rms
    kH = rms.EmptyHenryLawConstant()
AttributeError: module 'julia.ReactionMechanismSimulator' has no attribute 'EmptyHenryLawConstant'

Solution

I found that Pegah-B had mentioned a similar error in #2290 (comment) and said that mjohnson541's comment in #2290 (comment) had helped:

In the environment run julia to open julia and then type
] add ReactionMechanismSimulator#main
The ] will disappear after you type it.

This took about 10 minutes, to download and compile a bunch of packages, but worked.

After exiting from Julia, I once again ran python-jl $RMGpy/rmg.py input.py it ran to completion.

I was a bit surprised it was needed because I only built the environment and made all the Julia stuff last week, but if you end up here searching for something similar, it's worth a try.

Installation Information

Describe your installation method and system information.

• OS: MacOS X, on Intel
• Installation method: from source (current) in a recently created conda environment
• RMG version information:
  • RMG-Py: A few commits after the current main, 3.1.0-889-gace72d4b2
  • RMG-database: on the halogen_families branch

Additional Context

Add any other context about the problem here.

[rwest]

As noted above, the solution was: in the environment run julia to open julia and then type
] add ReactionMechanismSimulator#main
The ] will disappear after you type it.
It took ~10 minutes to download and compile updated julia packages, then solved the problem.