Neper -S -reselset error with tensor

[lloydvanwees]

I am attempting to find grain average values of the strain tensor. To achieve this I used the following command:

neper -S . -reselset strain,strain-el,stress,forces,ori

This yields an error as follows:

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.5.1-18-devel
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 96 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2022, and GNU GPL'd, by Romain Quey.
Info   : No initialization file found (`/home/llvanwees/.neperrc').
Info   : ---------------------------------------------------------------
Info   : MODULE  -S loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] . -reselset strain,strain-el,stress,forces,ori
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   :   - Reading arguments...
Info   : Converting FEPX result directory into simulation directory...
Info   :   - Parsing FEPX results...
Info   :     > Input files: tess tesr msh ori config
Info   :     > Node number      : 17445
Info   :     > Element number   : 11619
Info   :     > Elset number     : 100
Info   :     > Partition number : 48
Info   :     > Step number      : 6
Info   :     > Node results     : coo
Info   :     > Elt results      : ori elt-vol strain-el strain stress
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim'...
Info   :   - Writing inputs...
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/inputs'...
Info   :       . simulation.tess...
Info   :       . simulation.msh...
Info   :       . simulation.config...
Info   :       . *.sh...
Info   :       . simulation.ori...
Info   :     [o] Wrote directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/inputs'.
Info   :   - Writing results...
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results'...
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results/nodes'...
Info   :       . coo .............................................. 100%
Info   :     [o] Wrote directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results/nodes'.
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results/elts'...
Info   :       . ori .............................................. 100%
Info   :       . elt-vol .......................................... 100%
Info   :       . strain-el ........................................ 100%
Info   :       . strain ........................................... 100%
Info   :       . stress ........................................... 100%
Info   :     [o] Wrote directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results/elts'.
Info   :     [o] Wrote directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim'.
Info   : Running post-processing...
Info   :   - Loading inputs...
Info   :     > simulation.tess...
Info   :     > simulation.msh...
Info   :     > simulation.config...
Info   :   - Writing results...
Info   :     [o] Writing directory `/home/llvanwees/Desktop/caxis_g100_random_ori1.sim/results/elsets'...
Info   :       . strain ........................................... 100%
Info   :       . strain-el ........................................   0%
Error  :           Variable `strain' is not scalar (6 values).
./post_process.sh: line 9: 1088349 Aborted                 (core dumped) neper -S . -reselset strain,strain-el,stress,forces,ori

When attempting to grain average stress tensors, there is no similar error, and the command works as expected.