OpenFreeEnergy / OpenFreeEnergy/openfe

atom_indices are not monotonically increasing

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Python
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Description

When I run the tutorial with my own protein and small molecules, I got the following warning:

atom_indices are not monotonically increasing

So, I modified openfe/lib/python3.12/site-packages/mdtraj/core/topology.py as follows

np_indices = np.array(atom_indices) ===> np_indices = np.array(sorted(atom_indices)) (Line 94)

I wonder whether this change is problematic or not.

Thanks in advance.

P.S.:
use_dispersion_correction <= This setting means isotropic and analytical correction like DispCorr = EnerPres in Gromacs. Right?

Similarly, endstate_dispersion_correction means anisotropic and numerical correction like LJ-PME or EXP-LR in Gromacs. RIght?

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Research direction

Start by rerunning the tutorial with the reporter’s protein and small molecules, then inspect openfe/lib/python3.12/site-packages/mdtraj/core/topology.py around line 94 and the source of the monotonic-order warning. Determine whether sorting atom_indices changes required atom ordering, and clarify the meanings of use_dispersion_correction and endstate_dispersion_correction; done requires a confirmed resolution for both questions.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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