RuntimeError: Job process returned error code 1

Traceback (most recent call last):
  File "/usr/local/bin/run_openkim_job.py", line 546, in <module>
    execute_in_place(runner, runner_driver, subject, subject_driver, env)
  File "/usr/local/bin/run_openkim_job.py", line 396, in execute_in_place
    raise RuntimeError(f"Job process returned error code {retcode}")
RuntimeError: Job process returned error code 1

output/pipeline.stdout:
-----------------------
Atomic mass of the species (g/mol):55.845Lattice type (bcc, fcc, sc, or diamond):bccEnter a lattice constant (referred to as a_0 below) in meters about which the energy will be computed (This will usually be the equilibrium lattice constant.  Most of the volumes sampled will be about this lattice constant.):[]Smallest lattice spacing (referred to as a_min below) at which to compute the energy, expressed as a fraction of a_0 (for example, if you wish for a_min to be equal to 0.8*a_0, specify 0.8 for this value):0.5Largest lattice spacing (referred to as a_max below) at which to compute the energy, expressed as a multiple of a_0 (for example, if you wish for a_max to be equal to 1.5*a_0, specify 1.5 for this value):1.5Number of sample lattice spacings to compute which are >= a_min and < a_0 (one of these sample lattice spacings will be equal to a_min):30Number of sample lattice spacings to compute which are > a_0 and <= a_max (one of these sample lattice spacings will be equal to a_max):23Enter a value of the lower sample spacing parameter (see README.txt for more details):8Enter a value of the upper sample spacing parameter (see README.txt for more details):20Error: a_0 read in is empty. If using a query, check that it returns a non-empty value. Exiting...

output/pipeline.stderr:
-----------------------
Error: a_0 read in is empty. If using a query, check that it returns a non-empty value. Exiting...Command exited with non-zero status 1{"realtime":0.18,"usertime":0.11,"systime":0.06,"memmax":11132,"memavg":0}

output/kim.log:
---------------