Dear developers, I would like to report that calling gromacs/2020.3 (OS Cray Linux Environment) with the following command line, ``` gmx grompp -f min.mdp -c nointeraction.gro -p topol_hex_ms.top -n system_hex.ndx -o test.tpr ``` Results in a segmentation fault. You find attached the input files. Cheers Cristian [input_files.tar.gz](/uploads/976c7782ac33819c8270ca6b5bde7c72/input_files.tar.gz)