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!!!!!  VERIFICATION CHECK: vc-forces-numerical-derivative  !!!!!
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Description: Comparison of the analytical forces obtained from the model with
             forces computed by numerical differentiation using Richardson
             extrapolation for a randomly distorted non-periodic structure based
             off the equilibrium face-centered cubic (fcc) structure. Separate
             configurations are tested for each species supported by the model,
             as well as one containing a random distribution of all species.
             Configurations used for testing are provided as auxiliary files.

Author: Ellad Tadmor

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Results for KIM Model      : Sim_LAMMPS_AGNI_BotuBatraChapman_2017_Al__SM_666183636896_000
Supported species          : Al

random seed                = 13
perturbation amplitude     = 0.250
number unit cells per side = 2
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WARNING: The model provided, Sim_LAMMPS_AGNI_BotuBatraChapman_2017_Al__SM_666183636896_000, does not possess a non-trivial energy interaction for species Al as required by this Verification Check. Skipping...


ERROR: Failed to compute a single numerical derivative.


ERROR: Unable to perform verification check.

 Message = ERROR: Failed to compute a single numerical derivative.