Package molecule

[simongravelle]

OK so in that case LAMMPS was NOT recompiled.

I am not sure but it seems that you have the same problem as this one :

[lammps-users] Need to change my lammps version

Hi lammps users, I hope you doing well. I"m changing my lammps version to the 29/sept/2021 stable, but it sends me this "make serial make[1]: se entra en el directorio ‘/home/matias/lammps-29Sep2021/src/STUBS’ make[1]: ‘libmpi_stubs.a’ está actualizado. make[1]: se sale del directorio ‘/home/matias/lammps-29Sep2021/src/STUBS’ Gathering installed package information (may take a little while) make[1]: se entra en el directorio ‘/home/matias/lammps-29Sep2021/src’ Gathering git version info…

Also, is there a reason for using an older version of LAMMPS?