Segmentation Error 11 when running genrestr (KALP-15 in DPPC tutorial)

GROMACS version: 2020.2-MODIFIED (mac)
GROMACS modification: Yes
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Hello, I’m currently trying to follow the KALP15 in DPPC tutorial.

When I apply a position restrain, i.e.:
gmx genrestr -f KALP_newbox.gro -o strong_posre.itp -fc 100000 100000 100000

I get the following error:
Reading structure file
Select group to position restrain
Segmentation fault: 11

I read online that this segmentation error may be due to my files blowing up, but I don’t see why this would be the case. But I’m also fairly new to GROMACS.

Any help would be appreciated,

This has nothing to do with a simulation “blowing up” (physical instability) but is likely a bug. Please file an issue on the GROMACS GitLab site.