Hi dear lammps users,
I am preparing the simulation of cellulose by using LAMMPS, and use charmm36 forcefield to describe the interactions between atoms. I have got the PDB and PSF files of my structure, and also the charmm36 top and par files downloaded from http://mackerell.umaryland.edu/charmm_ff.shtml. However, when I want to use charmm2lammps to generate the lammps data and in files, I have problems. The perl script cannot proceed and just stop at the following state:
222_1.pdb (6.54 KB)
top_all36_carb.rtf (286 KB)
222_1.psf (21.1 KB)
par_all36_carb.prm (157 KB)