/* -*- c++ -*- ---------------------------------------------------------- LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator https://www.lammps.org/, Sandia National Laboratories Steve Plimpton, sjplimp@sandia.gov Copyright (2003) Sandia Corporation. Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains certain rights in this software. This software is distributed under the GNU General Public License. See the README file in the top-level LAMMPS directory. ------------------------------------------------------------------------- */ #ifdef FIX_CLASS // clang-format off FixStyle(enforce2d,FixEnforce2D); // clang-format on #else #ifndef LMP_FIX_ENFORCE2D_H #define LMP_FIX_ENFORCE2D_H #include "fix.h" namespace LAMMPS_NS { class FixEnforce2D : public Fix { public: FixEnforce2D(class LAMMPS *, int, char **); ~FixEnforce2D(); int setmask(); void init(); void setup(int); void min_setup(int); void post_force(int); void post_force_respa(int, int, int); void min_post_force(int); protected: int nfixlist; class Fix **flist; }; } // namespace LAMMPS_NS #endif #endif /* ERROR/WARNING messages: E: Illegal ... command Self-explanatory. Check the input script syntax and compare to the documentation for the command. You can use -echo screen as a command-line option when running LAMMPS to see the offending line. E: Cannot use fix enforce2d with 3d simulation Self-explanatory. E: Fix enforce2d must be defined after fix %s UNDOCUMENTED */