Too many neighbors , check the configuration

[akohlmey]

First off, please see the notes about properly formatting quoted input files here:

Please Read This First: Guidelines and Suggestions for posting LAMMPS questions

The LAMMPS categories on MatSci.org are the primary way to get help with installing, running, programming the LAMMPS Molecular Dynamics software package and to facilitate exchange between LAMMPS users and developers. The main motivation of using a forum versus the traditional mailing list is, that this allows anybody to join a discussion at any time and try to provide assistance, even when they have not been around when the original question was posted. As the LAMMPS community is growing, the po…

Does the error happen instantly or after some MD steps?

Your pair style setup seems wrong. The documentation for the ilp/graphene/hbn pair style explicitly states that this is not a standalone pair style, but must be using in addition to a potential for the intra-layer interaction (Tersoff, REBO, etc.).